Communityinterview

HE ACCIDENTALLY MASTERED AERODYNAMICS | DAN BIGHAM

Name: He Accidentally Mastered Aerodynamics | Dan Bigham
Uploaded: 2024-09-13
Duration: 45 min 10 s
Description: Dan Bigham accidentally became one of cycling's aerodynamics experts while chasing performance gains, and now he's shaping how the sport thinks about drag.

with Dan Bigham — Head of Engineering, Red Bull–Bora–Hansgrohe; former UCI Hour Record holder

45:10·13 September 2024

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DAN BIGHAM

Head of Engineering, Red Bull–Bora–Hansgrohe; former UCI Hour Record holder

PROFILE →

Dan Bigham is the British engineer-rider who held the UCI Hour Record at 55.548km in 2022 and now leads engineering at Red Bull–Bora–Hansgrohe. He is one of a small group of people who can talk credibly about both sides of the marginal-gains conversation: the wind-tunnel physics, and what it actually feels like to hold an aero position at threshold for an hour. His work on time-trial position, equipment selection, and pacing strategy has shaped how the modern peloton approaches every TT stage.

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Wikipedia britishcycling.org.uk

TOPICS

Dan Bigham accidentally became one of cycling's aerodynamics experts while chasing performance gains, and now he's shaping how the sport thinks about drag. We dig into how he smashed the world hour record, why claiming wattage savings on gear is more complicated than it sounds, and what everyday riders can actually steal from pro-level aero development without access to a wind tunnel.

Key Takeaways

Q factor reduction (foot spacing) of just 10mm can deliver 1-1.5% drag reduction—worth 2-4 watts depending on speed. Small geometry changes have outsized aerodynamic effects when tested individually.
Most commercially available aero sensors now work well enough to tell you if setup X is faster than Y, even if absolute CDA values aren't perfectly accurate. Consistency and comparison matter more than hitting exact numbers.
Tire-wheel-frame-rider interactions are a massive optimization puzzle. Use simulation software like Best Bike Split or Aerotune to normalize manufacturer claims to your actual speed and conditions before buying.
The fastest aero suits are uncomfortable and trap heat; the most breathable ones sacrifice speed. Heat dissipation will become a performance limiter as races get hotter, especially in July in France.
Training consistency and volume trump equipment optimization for long-term gains. Dan's biggest regret from his early team days wasn't lack of gear—it was underrating the foundation of solid, repeatable training.
Marketing claims need scrutiny: check the testing speed (80km/h claims are often irrelevant), yaw angles tested, and whether data comes from simulation or actual wind tunnel protocols. Chat GPT can help you normalize claims to your conditions.

Expert Quotes

"I hate wattage claims. A lot of these solutions are individual so the result I would get if I changed a helmet or skin suit or a wheel crank set would be different to yours. How do you therefore advertise an improvement?"

"Most people listen to this don't know what Q factor is and so they're like 'who, I can reduce my Q factor, what the hell is that?' Marketing kind of bridges that gap."

"The biggest thing I would say is training consistency and it's something that I think collectively we probably underrated as a team. That's where the long-term improvements come from."

KEY QUOTES

“a 10 mm change in Q factor so literally 5 millim per side could be about a one one and a half% drag reduction which is like not an insignificant amount of Watts we're talking like two three four Watts depending on your speed and the cus crank can depends on what you're going from and to but you can get like 10 15 20 millimeters depending on your bottom bracket spec of of Q factor reduction and then that means you get not2 not3 not4 which could be up to like well individual Pursuit speeds you're talking 10 watts or so”
Dan Bigham — World Hour Record holder and aerodynamics specialist

“I hate watt claims uh I even I just dislike those kind of claims in general because a lot of these Solutions are individual so the result I would get if I changed a helmet or skin suit or a wheel CR set would be different to yours hopefully on the majority of it should be similar but it might not be and how do you therefore advertise an improvement because you as an engineer you you do the best you can to develop a faster component but it might not work for everybody”
Dan Bigham — World Hour Record holder and aerodynamics specialist

“the tire because it doesn't just do rolling resistance or just do Arrow or just do grip or just do damping does all of the above and the directions you go in for one optimization is not the same as another and then like I say you add in the wheel you add in the frame you add in the rider you ride the course the conditions is it wet is it dry is it hilly is it cobbly all that kind of stuff it's huge optimization problem”
Dan Bigham — World Hour Record holder and aerodynamics specialist

EPISODE TRANSCRIPT3 SECTIONS

Welcome and family life

Roman you're going to absolutely love today's conversation with Mr Dan Bingham we sit down for a wide ranging conversation we talk about his world arror record the techniques and tactics he used to change the arrow game his recent move from inos grenadiers over to one of the biggest teams in the world Red Bull and we talk about how you the average everyday Rider can eat out some extra Arrow gains from your setup I'm excited to dive in Mr Dan Bingham D Bingham welcome to rob my podcast awesome to have this would be along long really it's uh one I've actually listened to quite a few episodes it's uh yeah one I guess we've had in the pipeline for a good amount of time and not nice to find the time so uh yeah awesome to be on thanks for anyone watching on video as well that we kind of have matching mustaches at the moment I think that's more my laciness post Olympics to look at to myself can barely ride a bike at the moment let show my bit it's a good club to be in though I had valter Bas was on as well and we started the podcast talking about mustaches so we're in a solid mustache Club yeah my mom was kicking off about it the other day facetimed her to show Theo off he starts walking yeah get stick for mustache I think one of the first times we were going to do the podcast and it fell true was you were having the bir your for child yeah just over a year ago now he's uh moving quickly thank you yeah it's been a very awesome experience uh you obviously learn on the Fly and they're challenging little things and every week's different every day is different every night's different but uh yeah it's really rewarding and at that point in hour ways yeah crawling around walking around and Germany's like a person will be the very little one and that's really fun really awarding have you started thinking about how aerodynamic you can make a balance bike uh so literally just yesterday we got what's called a globber which is like a bike scooter hybrid thing and absolutely yeah you start think about those little things don't you and there's some really cool balance bikes like honestly the market has like some really good engineering specializ do a carbon one I see not cheap though but maybe the whole new job might help there yeah there you go the big book The Big Book is it frustrating I was doing a little bit of prep for the podcast and you know obviously you know we're we've been in kind of parallel ecosystems we've even raced against each other down in beautiful curry in south of Ireland and Ross Mo before uh but I I I just you know Googling your name and checking around the things I seen coming up a couple of times as people going you you're only fast CU you're arrow and I thought that's the weirdest thing to ever say because it's like yeah you can only climb well because you're light like what a bizarre statement yeah I've heard it a lot in many different iterations there was one that um I don't know who said it but it was relayed to me by um Med cordi back when he was a British cying something like when we kind of broke from to the scene of like yeah they might be Arrow but everyone will catch back up anyway and definely kind of went the other way I caught them on the physiology and kept moving forward on the eror side that they didn't particularly catch up although it did it was that point in time when eror just became a bit bit crazy and yeah it is one of the reasons have past I mean I'm not a terrible athlete I still push decent wats but I'm definitely not your top tier Grand Tour winner kind of guy and yeah probably a bit more closer to your Keen amateur and sort of threshold numbers and Sprint numbers but just very good on the Arrow side of things yeah no it's it's the weirdest criticism I've ever heard you're only fast because you're Arrow but let's dive into some of that stuff because the arrow to me is super exciting as you know you're an athlete and I don't know who's putting these comments up you're only fast cuz you're Arrow cuz you had the world Arrow record like I've I've literally never spoke to somebody who's ridden a bike forer in an hour like 55.5 kilometers is ridiculous the Irish hour records like 47 kilm or something which we might put a pin in that come back to it because I'm tempted by that but the arrow stuff is moving so fast like I was looking at speed suits the other day what what's your thoughts on this Vortex Jewel their skin suit is it [ __ ] or maybe even give us some context as to what it is for someone that doesn't know what we're talking about sure it's first is absolutely legitimate uh skin suits are a really interesting area of research so the vortek whole product line really has been you could arguably say it's Evolution since like Beijing and London the guys behind it primarily uh Rob Lewis he was one of the secret scolls back in the day developing alongside like Sally coward who was the seamstress obviously Chris bman Etc they were doing a lot of the the development around all the textiles and they had the whole um plastic suits or what you rubberized suits back in sort of London and Beijing and then for Rio they came up with this technology basically like a jewal layer so in simple terms it's a base layer or a bottom layer and there's a top layer and in between they just put ribs different sizing spacing geometries and what that does is interacts with the air flowing over the surface and without going too much detail helps to keep the flow attached for longer around your body in specific areas where that's required so predominantly it's basically like your upper arm and your lower leg they're kind of the areas where you can have good impact with these kind of fabrics and yeah it can be really significant the really interesting bit and the advantageous bit of the whole dual layer technology is there more variables to play with and say it's single layer because you can change the material you can change how it's woven you can change the tension of it you can change the rib size the rib spacing the rib geometry and all these things kind of interact that means you can really optimize for a specific Rider in a specific position at a specific speed and that's kind of the way the arrow is generally going like we made big improvements and those small refinements really just come from individuality is Vortex offering basically they'll you pay them not an insignificant amount of money and they'll make it's like three grand for a speed yeah three grand and if you go for their full R&D process I think it's like 89 10 grand maybe for the whole package but they'll make like 20 skin suits you'll go to the win you'll test them all and you take the fastest one home that day and if you don't make a significant Improvement I think there something like a 2% or 3% like promise you can go home and not pay a thing which is pretty cool but is one of the benefits though because I've used the base layers that's like from rule 28 and stuff that have the ribbed Bas layers now I have a friend who works uh with a different clouding company and he was telling me in the Wind Tunnel that they're kind of strange because if you don't fit the skin suit properly over it there can actually be a time penalty rather than a Time saving is the benefit of the vortex this suspended layer so we don't have those fitting problems with the base layer yes or is that a very simplistic look at no it's definitely a good way of explaining it so with VTech and other brands they basically sandwich the base lay into the suit so you can't not fit it correctly I mean there's other advantages to what HTE do they full 3D scan you and use some computational draping technology to tell you exactly what your perfect patent is to have the right tension all over your body where the seam should be things like that so you it's it's not that it's it's just money for old tat is like it's really interesting cool technology but you can achieve a lot of it or go a good way towards achieving that kind of performance with like a all 28 base layer like say there's lots of other brands out there doing it but you have to do your testing because if not you can end up bit worse situation and their website saying it has omnidirectional drag reduction I don't know what the hell that is but if I say it fast enough I sound really smart I think that's uh Chris Beck getting carried away with his marketing speak uh what do they mean by omnidirectional maybe it's a your angle thing maybe it's a fabric orientation that's what I was figuring it's not something I would use in my marketing lingo but yeah I don't believe they need to oh I'm really anti- marketing I hate it as a like a a thing like as an engineer I just if if something makes sense it's going to be fast I'll go buy it you don't need to tell me like 20 different ways in a load of big words because you eat myosaurus like just if it works it works but like for my company what shop it's a really challenge CU I'm just like it's a good product should sell itself but unfortunately marketing does work I think like most of us who worked in that Arena recognized that yeah like I think about it as like do you know it's that somebody wants your product like there's different customers isn't there's me geek and I used to have a marketing company like there's someone that knows they have a problem and they know you're a solution but there's another group of people out there that they have a problem but they don't know you're the solution so marketing kind of bridges that gap for instance like your kattus crank set as I pronounce is that right uh like so that's working by reducing the Q factor and then you're getting a aerodynamic gain because the Q factor is reduced most people listen to this don't know what Q factor is and so they're like who I can reduce my Q factor what the hell is that so that's an example of bridging that Gap this conversation now because everyone's going to go and check out what the hell is this so explain that crank set to me and how it does that sure so that that product came about I think our first prototype was 2019 back in 2019 uh with the Hub B Truck team and it was it just came about through track testing where we were looking at like what's sensitive like what if you change something do you get is it better or worse or is it neutral and there's tons of things you can change that don't really impact your performance and there's a few things that you tend to find with individual people sometimes for everybody if you change even a little bit it's like a huge benefit and Q factor which is effectively your your foot space and laterally if you bring that in the vast majority of people see a huge Improvement in aerodynamics so like a 10 mm change in Q factor so literally 5 millim per side could be about a one one and a half% drag reduction which is like not an insignificant amount of Watts we're talking like two three four Watts depending on your speed and the cus crank can depends on what you're going from and to but you can get like 10 15 20 millimeters depending on your bottom bracket spec of of Q factor reduction and then that means you get not2 not3 not4 which could be up to like well individual Pursuit speeds you're talking 10 watts or so even it's um it's really big really big but you know when we're buying this stuff down and say you know we go to your website and we buy something like this that has a wattage claim on it like I often wonder if you sort of a stream analogy is that an upstream decision that has Downstream consequences the positive or negative like if I change my Q factor and I buy this off the website without having access to arot Tes and does this as an extreme example I don't know pop my head up a little more and now I'm less ER because of it or how you know how do we differentiate stuff that we can just take the claims about wattage gains on face value versus the stuff where if we take the face value claim it's going to have a downstream consequence that may be a penalty yeah I guess there kind of two questions there the the first one is is I hate watsh claims uh I even I just dislike those kind of claims in general because a lot of these Solutions are individual so the result I would get if I changed a helmet or skin suit or a wheel CR set would be different to yours hopefully on the majority of it should be similar but it might not be and how do you therefore advertise an improvement because you as an engineer you you do the best you can to develop a faster component but it might not work for everybody and it might be amazing on some people and terrible on others or it could be mediocre for everybody it could be a slight Improvement it could be only work in certain conditions at high speed or high Y and therefore how do you really Market that how do you say it's X what's faster it's X what's in a certain scenario or in this test person or on our test Cort of 10 Riders it's it's a really frustrating area and there's not like a I guess a generally agreed approach to how the sport should Market that so there's people claiming stuff at like 70 80k an hour for Arrow and that's really not relevant for 99.9 customers are getting a little bit more are customers getting a little bit more W to that like because we're seeing these Brands you know wheel Brands talking about wattage gains and everyone's kind of waking up to go on yeah like is that 80 km an hour at a very specific yaw angle that I'm actually never going to ride in and they just tested that in the Wind Tunnel you know or you see frames that are after market like full production ready frames in the wind tunnel and they're testing them I'm like how are you testing it if it's full production ready like it's already been sprayed on marketed and now you're bringing it to test it it's like it's a bizarre like marketing chain or a supply chain yeah I I'm a big advocate of Manufacturers releasing as much data and much information about their protocols as possible because they like a keen consumer like yourself can go in and try and understand it because it's not super complex it's not beyond the will of man for any of us to try and understand a bit of this and to plug the numbers in and and say watch okay they've claimed it at 50k an hour but if you normalize it for my Road Race speed or triathon speed of 40 45k an hour it's actually slightly less or they've only tested especially because AI can help us with that now as well chat GPT is awesome I BL Love chat GPT really yeah I'm using that to like to bridge that gap between me my background's law I'm not an engineer I'd have friends and I'd be playing engineering questions and their response now is just put it in chat GPT put it in chat GPT does oh it's an absolute dream the problem is I guess when you you putting like text in there it does come back and it doesn't always read like you that's what I always find a bit frustrating then you kind of re-edit it again as like I wouldn't quite say it like that but from like an engineering perspective what's the equation for this how do I recalculate the drag saving of this and that yeah it's amazing really in that respect uh yeah to go back to your point I think there are a lot more uh astute uh customers out there now and the ability to test as well there's a lot more independent Test Facilities there's a lot of Manufacturers that sorry not manufactures individual test houses I guess like ourselves or a coach or whatever testing components that aren't related to our businesses like tires or drivetrain maybe in some respects you can then put the data out in the public domain and that can be really helpful again you kind of have to understand their protocols the limitations of it and that's not always super easy but it at least is going in the right direction that it's not just this black box anymore that actually people can go out there and get some sort of fair honest data talk to me a little bit about wheels and tires I spoke with Matt botrell not too long ago on the podcast and we only had time to scratch the surface of this he was saying now a lot more the trend is going towards the whole tire wheel frame body like looking at the totality of the whole system rather than objectively saying hey these are the fastest wheels or these are the fastest tires how did you how do you think about that that whole setup now it's um it's probably the biggest area of low hanging through in current performance the the primary thing is the tire because it doesn't just do rolling resistance or just do Arrow or just do grip or just do damping does all of the above and the directions you go in for one optimization is not the same as another and then like I say you add in the wheel you add in the frame you add in the rider you ride the course the conditions is it wet is it dry is it hilly is it cobbly all that kind of stuff it's huge optimization problem and with my time at inos we spent a lot of time and resource developing the simulation software with all of those equations built in where you could literally set up your course with all of our tires all of our tire pressures all of our Wheels press go and it comes out and goes okay this is the time that you will ride with all of the possible setups that we have and therefore your fastest setup is is X and that's kind of the level that you have to go to now at least at the world tour if you genuinely want to to compete but then you can use that to then feed into your development cycle so if you know that you got experence certain conditions you can optimize around those kind of conditions as a manufacturer but the interactions are huge so what tire you pick on the wheel at 25 might work great on one wheel and absolutely terrible on another or 28 or a certain type of tire so like you have vulcanized tires like your Schwab and your Continentals and you have you call them that open tubular like you cotton side walls so uh Victoria you specialized Etc and they perform very different aerodynamically but they also perform very different from roolling resistance perspective and it comes down to calculating the the Delta between the two if one's really bad at high Y but really good at rowing resistance is it faster is it slower it's it's a bit of a Minefield because you've got to understand all those aspects of your optimization equation but also it's pretty cool at the same time and is there a way for a lay customer to start getting like you know you had the might of anyos and now you're moving across the Red Bull which they running specialized oh specialized need a new tire actually turbo cotton must be 10 years old uh 12 I think London 2012 was it first used 12y old Tire yeah they need a newre yeah no comment don't know actually just joking I don't know I she started a week ago I have no idea but like how do we start to make sense of that as you know for me next year we spoke a little bit offer I'm going to come back start training really with this kind of idea of how good can a [ __ ] cyclist be if they have access to all the best Minds in cycling with you know John Wakefield coach me doing hexus do nutrition you know I'm sure I'll pick your brain a bit on Arrow stuff but how does your lay that doesn't have access to a world tour infrastructure start to make Tire choices and wheel choices yeah it's a it's a problem but not one that's interm manable so I think firstly using a good simulation software packages that are available best bike split aor tune they're probably the two primary ones out there that can you can put data in you can say these are my CR values this is my CDA your curve those are the kind of inputs that you can put in and you can use that to simulate your time trial assuming you're doing a time trial or Tron road racing a little bit harder because a lot of complexities of you're kind of riding in a bunch and then maybe you're not because you're attacking or climbing but anyway we'll stick with TTS for now or dropped or dropped try not to be dropped by that point your races R who cares what ti is really uh but basically it then comes down to taking either independent data or manufacturing data throwing it into chat gbt and saying this is the time Tri running this is the data was calculated in this way can you normalize it for my speed feed my weight Etc get those numbers out and it is equation of of what's really of like how how much more resistance will difference will you see and what AA difference will you see there's a little bit of weather thrown in there as well so you need to then look at how that tire wheel behaves at your and either you've got to go and get that date yourself for the wind tunnel or you hope the manufacturer supplies it and to be honest quite a few are uh parkour was released some really interesting data just this week on I think they had five or six different tires on a load of their wheels they gone to the tunnel and looked at how they all perform and the data is freely available um and that's just kudos to parkours and ssde do something similar a lot the manufacturers out there are being a bit more openmed because they accept that the customer wants this information and needs this information to make an informed decision but the long and short is it's not a quick thing it's not an easy thing you need to invest time but then if you do that and your converted doesn't you've got an advantage and all the better for you A big on known for a lot of us with this homemade Bro Science equation we're trying to Ru it's our CDA because most of us haven't been to the wind tunnel have you played around with stuff like gibli and these home AOS sensors and if so how accurate are they uh I guess it depends what you want do you want accuracy which in itself is pipe Tre for pretty much any setup myself included try to explain why in a second or do you want the ability to test differences between different setups because they're kind of a bit like different thing do you want to know exactly what your CDA is or do you want to know that X is faster than y so is this like when parameters came out with to start and stages was massively up like it might have been 2% different to SRM but then they started getting it where it was quite repeatably wrong where so you could it still was useful tool yeah exactly that you would I think predominantly the vast majority people don't need accuracy they need to know is a is product X better than product Y and sensors are starting to get there there's still limitations um I mean primarily actually the two ones are ability to measure uh both accurately and precisely the air speed in your angle and then the second one is your elevation elevation is like such a huge problem that I don't think until you dig into it as a problem itself it's um one that you just assume is okay and we figured it out but like barometric altimeters they can't measure to the level that we need and then you're having to bring other sensors into the mix and get Sensor Fusion or you're having to do certain protocols that may you ride out and back multiple times on the same section and iig in the altitude out uh but most sensors are getting to the point where they are useful uh for that they will be able to tell you if one thing is faster than the other um I've worked a lot with with streamlines so John Bley I actually worked with him back in Mercedes Formula 1 in 201 2012 2013 and then he's kind of gone into about um his error sensor alongside Barney who is eror sensor he is's a bit confusing name yeah I I had Barney on the podcast actually he's interesting guy a really interesting guy and obviously they they split in part ways but the technology they use is is the same and I'd say say between those two they're probably the ones leading at least the commercially available censors there's a few of out there that I have a really good friend called Marco Manny he's suici nesy Works in wind power generation he's designed and developed his own AOS sensor F and literally got it here is quite cool it's like a a magic those medieval games where you're onun a horse and you're like L someone but it's a really cool Senter I mean it's pretty simple how it's made it but the good thing is that it moves the probe out of most of the static pressure interference of the rider so when you're riding along that you basically there's a big pressure front in front of you that your body is creating and the further you can move that out of that the less interference there is because there's a lot of speed sensitivities that interference and also how you move your body if your head comes up or head comes down so it's ideal to move it farther forward but that's a hard thing to do for like a commercial product how do you make it rigid and held in place a meter or meter and a half in front of the rider so it's um it's and they're all trying to tackle it in different ways uh but I'd say most senses now you can get good data and then most of it then comes actually having a good power meter because power is the key bit to this and there are a lot of crappy power meters out there it's been like a race to the bottom for the past 10 years who can make the cheapest power meter not who can make the best yeah I remember my first power meter and I've told this story before on the podcast I was 2 five I'm going to say 2006 I was an undergrad in University and I knew I hadn't got money to pay every month for a coach but I was starting to dig into some of the data and understand you know how you coach an athlete and I was like I need to get my hands on an SRM but it was like €2,500 Euro at the time so I falsified like a bank loan application told them I needed a car to drive to UNI it took me four years to pay that back but it was worth it it was worth everything your data was beautiful I love SRM for just how open it is the fact it's literally just a frequency output M strain gauge and they'll tell you what the zero offset is and they tell you what the slope is and you can check it and yeah it just works um yeah they had a few fls in the early days around temperature compensation because of the Simplicity of it which they've since addressed but it's just a really good clean system and yeah I highly rate Sr I'd say they're pretty much Market leading um there's a few of us that getting pretty close and there's a few of us that absolutely have gone the other way and like I said race to the bottom and the error sources can be horrific I think anything that's single-sided you may as well just put in the bin it's not worth it for eror testing you're at the very minimum need je sided um yeah just you have to have a good power Meer really at least if you want reasonably accurate results which is obviously another point that we talked about how much do you actually care about the absolute value and people claim like CDA is X or CDA is y and doesn't really matter in the grand scheme of things because if your pet reads 10% High you CDA 10% high so it's more a case of uh we are so excited to announce that we are partnering with whoop whoop are changing the game when it comes to work wearable technology and health monitoring whoop is a wearable health and fitness coach that provides you with feedback and actionable insights into your sleep your recovery your training your stress and your overall health Sarah and I have been using whoop for years and we love the insights it provides into our body's inner workings it really gives us a look under the hood and you're going to see Matthew Vander paaul Richard carass another Elite level cyclist wearing whoop but it isn't just for those Superstars all the data is personalized to your unique physiology and fitness levels if you're interested in taking control of your health and your Fitness so that you can excel in all aspects of your life you have to go and check out whoop go to the URL now which is join.

Huub Wattbike team origins

Woop.com roadman I'm going to pop that in the description below and you're going to get a free month's access to whoop membership on me I promise you won't regret it yes so actually talking to ulie on the podcast next we he's the founder of SRM meant to be super interesting guy never spoke to him before just had a bunch of back and forth on WhatsApp if you were gone back what what year did you set up your h w bike team was that 2016 2015 so it started off team PF was back in the 2016 we raced the Nationals January 2017 and then our first World Cup season was 2017 2018 and then became who W like in 2018 19 season like that was insane that was a like such a cool David versus gooed story like for anyone that didn't follow like it's worth going back to trace the evolution of that team and you know the Sho string budget you guys were on and the times you're putting down and beating like it properly was David versus Glide like you were coming up against the GB track Squad and you're handing it to I'm like but here's my question with that one if you were to go back now with the benefit of you know bonds of a decade of experience training and racing yourself at the highest level and your aerodynamic experience what would you change with that team now on the set off that's a really good question I mean more money would have always been helpful so give Clarity so our first year our entire budget was £6,000 and that was registering the team living so this is accommodation food travel Logistics equipment training for a whole team of 16 Grand it was actually we were literally living in slums in the back end of Derby like as poor students it was I loved it in hindsight mean at the point time like what we do we're getting broken into every few weeks but I was yeah you probably look back with roasting spectacles but it was really doable what would it different I probably actually well I mean there's definitely a few things on the a equipment from but actually the biggest thing I would say is training consistency and it's something that I and I think collectively we probably underrated as a team of like that time of just doing good consistent training and and volume as well to a good degree a lot of our approaches around intensity and and replicating the demands of the event we're doing a lot of Team Pursuits like we' go to a session and do four standing 4ks which is absolutely unheard of crazy yeah no one did that and maybe in HS that it wasn't the ideal training because we were doing that once or twice a week and yeah it probably burn yourself out so yeah I would lean towards just the training consistency and getting the volume in because that's where the long-term improvements come and that's one of the reasons that I've progressed and be able to do things like the hour record because yes my aerodynamics improve but physiologically I'm a better athlete than I was six seven eight years ago whenever that was now um and even like the team Su backing it up like if you look at competitions now you go to the world Champs you qualify team suit then 24 hours lateer you do the rounds six hours lateer you do the finals 12 hours after that you do the IP qualifying six hours later you do the IP finals so you're doing five writing give a take 48 hours and that that that takes that durability that time of just consistent training to to really that's what I liked in the early days you guys definitely seemed like you were out ahead of the curve in terms of aerodynamics but something that seems to have really been a priority for World Tour teams and looked like it was a priority for you for the ER record was heat dissipation do you think the next evolution in materials is my my sort of where I'm coming from with this question is it seems like gains and aerodynamics are going to get harder and harder to get because we've got the par 80% of Gams early in aerodynamics and they're getting harder and harder to find these are we going to find these next Gams in heat dissipation probably the trade-off between the two is the key bit because at the moment most of the Fabrics that are really good at heat dissipation are actually terrible Aeron namically and vice versa the fastest suits are really uncomfortable to wear especially for long durations and vice versa so and same prod FL the helmets yeah same with helmets I think to predominantly actually I'd say the suits are more important I think helmets are a mental thing so they feel hot and you honestly you do respond to what you feel not to what actually happens but once you kind of accept it's probably more of not Placebo but is a mental game of the heating your helmet the actual cooling side is not that critical around your head most of the cooling is the big body mass that you've got that's where all the energy is getting created heads why like the hour record with hoofing down kilos of ice because so easy yeah I couldn't believe how much slushy you drank I mean ganis was Unreal I think he was 2.2 kilos for his hour record of ice she's just like ice brain freeze was a problem for the a record it literally was like licking the roof of your mouth even that doesn't particularly help a huge amount but from formance receptive absolutely gamechanging so I think yeah to come back to your point yeah cooling is going to be a massive component of performance because like climate change we can probably all accept as a thing nowadays and everything's getting hotter especially that that really important race in the middle of July in France it's absolutely cooking year on year and it's only going One Direction so the more we think about it the more I think the performance is going to improve in those extreme conditions and it's the training as well well like how do you adapt to that heat dayto day it's something that you've got to be able to tolerate and not just be able to do once off you've got to do it for 20 whatever consecutive days back to back and it can really can do a lot of damage heat Str so you've got to think a lot about it it's it's the preparation it's the execution the race and it's the how you deal with that afterwards as well and getting your body back to a sensible temperature and so you go and sleep really because if you're cooking hot it's it's going to wreck you recovery at the same time you think we can build cooling into the HS and Ro bikes depends a lot on the UCI and what they want us to do around like onboard Technologies I mean I'm a big fan of increasing the weight limit I think I've been I've said it a few times everyone's like are you Mentor we want super light bikes it's like well do it like if you've got an 8 kilo bikes something you can throw those of cool technology Out imagine like front and rear GoPro all the like live onboard data even like microphones in the peltin which I think uh probably few people might be against like I you and I both in the Pelon it's not always the most Pleasant play but uh like the Insight from a fan engagement perspective would be absolutely gamechanging and a I'm more yeah I'm an advocate for it with the UCI listening or not we'll wait and see but um yeah I think that would enable things like onboard cooling which may become a necessity in 10 20 years time I don't know but it's it's a hard thing to do efficiently in in small uh small things because it affect energy so you like if you look at a fridge it's cool on the inside but it's hot on the outside and it's the energy required to to to work a fridge pump and same kind of concept um hence why to go back to the ice Point you're eating loads of ice and it's the changing of the ice to a liquid it's called phase change uh it takes a lot of energy and then they raise the temperature of that liquid and then you sweat it out and changing into a gas and again that takes a lot of energy how much of your uh job as an engineer is trying to work within the U UCI limits and how much is there like a latitude for you petitioning or your team petition duci to change regulations Ro man I'm going to date myself here but I've been riding the bike for almost 20 years and in that time I've cycled through every cycling apparel brand out there and I kept swapping out different apparel Brands each season until I found laal there's something really different about laal and as soon as you slip into the gear you notice it feels different it feels better I've had the pleasure of chatting with yanto Barker on the podcast he's the lall founder and his d ation to crafting the fastest most refined cycling apparel out there it's nothing short of inspiring yanto isn't just trying to create gear I get the feeling he's actively and obsessively trying to perfect cycling gear trust me as soon as you slip on the the call Kit as soon as you zip up that Jersey you can feel that commitment the proof for the call it's in the pudding this is the same kit that Jay hindley wore when he clinched overall victory in theur Natalia there's a confidence that comes with wearing apparel that's been battle tested and po improv and in races like the Italia trust me feeling good on the bike means you're going to perform better if you have a second I highly advise you to jump on over to lol.

Influencing UCI equipment rules

CC and check out their amazing range of Kit and experience this feeling for yourself so proactive changing your regulations pretty rare I would say it's something that I try to push for and I make suggestions and there's kind of different avenues for that I have good relationship with Andre who's now the head of the m Department he took over Michael rogers's role when Michael left tell when that was probably four five six months ago now uh but then there's another Avenue which is the World Federation Sporting Goods Industries so they're like a lobbying group of all like the big Sporting Goods people in the industry see like your your Zips your Victoria content tools who they out you on that that committee so I can kind of sit on those meetings and then you can kind of influence and the kind of a bit a bit of give and take to sometimes it with the industry saying we don't like this rle at least to change or at least to go in this direction sometimes it's the UCI can the other way of actually want to try and ban this or change that or limit this what do you think how should that be done so that it doesn't ever really particularly come as a surprise at least to the big players in the industry sometimes the small guys you're not really involved and then often the U have approached the small people as well so I've sat in meetings with like the like us era coach Bellow bike rid sing so the small Niche kind of startup Rands of the last few years sitting there with the UCI talking about like cop design where that's like Drop bars extensions that kind of thing and really on the Trap side that's where most of the developments being done within those kind of small leiche Brands which is pretty cool because your big players don't seem to get involved in that Arena quite so much so the the hot B of track arrow is more the kind of Niche designers is quite nice um but day-to-day realistically it's more about trying to work within the rules as they're written and then the U side typically will go well actually that wasn't really the intent of the rule we'd rather you didn't do that and then you kind out this to thr of actually what's the intent versus what is what is the actual uh written rule and where do we meet in the middle normally so I'm I'm kind of big on my undergrads in economics before I moved across to law and large parts of Economics are based on incentives and with the incentive for performance we're so highly incentivized to eal gains for Speed the EO gains for aerodynamics for grip for Rolling resistance we so po incentivized to innovate around safety and that's why I would love to see that weight limit going up and you know as a ex Rider and somebody who's a lot of friends still in the Pelon you know safety is such a huge problem you know Gino passing away last year you know there's bad crashes in you know every country in the world at a local level every weekend but there's so little innovation in terms of safety as well like as an engineer is that frustrating or is it just you have to focus on what you're pay to focus on it is for St it was actually one of the first discussion points I had when I went to meet Red Bull one of the head senior guys at Red Bull Red Bull was like what do you think about safety sight thing you're like oh caught off guard thought you might ask about skiny but it's a genuine problem how you tackle it I think there's a lot of different ideas I think a lot of it is going to be have it's going to have to force on Riders I think Riders right now are very anti things like for example like additional layers and your clothing that help when you crash to deal with road rash Etc I think it was a survey done by the CPA and most Riders said no I don't want it is kind of a bit like if you rewind decades when people like oh do you want seat belts no I'm fine it's like you get thrown from the vehicle it's okay it's like well no it's not okay and that makes such a difference even like I'm sure you've crashed with a base layer and without a base layer like the difference in terms of Road Rush it's insane but then it's the UCI you have to either regulate for it or encourage it and quite often the opposite has happened um I've heard of Manufacturers going to the UCI to mind if we put this in and then they get backup thinking oh maybe it's narrow intervention that we we should ban it's like no people being proactive on safety but then the Riders don't want it because it's 50 grams heavier and so how do you tackle that wait limits yeah but it's um yeah it's a big old problem I mean there's other things isn't there like how safer descents catch Nets pre-ww warnings we just said wow crash out the felter when he was on his way to win probably a couple of jerseys and that was a corner that wasn't sign posted but was when they last used it a few years ago and why has that changed because they clearly assessed it a few years ago so is unsafe why is it to me okay now yeah it seems like we've talked about chat GPT it seems like this is a PID ad for chat GPT we mentioned it so much but like a big data approach to this must surely be attractive as an engineer where we look and we analyze every single race every single crash that's happened and start like penalizing races with poor safety records and incentivizing them to have safer Corners have more marshals on Corners roof around you know potential if a crash has been on the same Corner five over the last five years like should that corner be in race exactly that but it needs to be independent at the same time I think safe for singer maybe a group who are doing that and they assess a lot of the races and then give us give recommendations to the organizer the organizer isn't required to adere to those and I think happened back at the big exilia crash when yonas Remco I mean let's be honest nearly died they had some pretty serious injuries and that was raised in the safer siing report that wasn't addressed by the race organizer so again it falls on this kind of like triangle race organizers independent safety in the UCI to somehow regulate and say you have to meet these we've had it in other ones like sprinting was it tour Poland they always had a stupid downhill Sprint finish stupid downhill Sprint here where yakobson and gr wag and nearly killed each other and yet what happens what changes I might say it needs incentivizing but doesn't see the UCI really take it seriously as a problem like bury the heads in the sand even to bring this conversation full circle and wrap it up we started out talking about your career and you know definitely it it's frustrating to to me when people are like oh you know limited Talent got a lot out of himself like exceptional Talent H and got a lot out of himself I think is a better way to categorize it but do you have any regrets that it seems like now you're moving to Bora and you're balancing Elite Sport days are maybe behind you or do you have more Ambitions no I think you're right go to the worlds in how many days says on my phone 39 days 39 days to Worlds and that will probably be my last International Event for GB I me never say that I could do like gravel worlds or Esports worlds or something like that but more for a b um aets I think the one thing reflecting back on the Olympics is that because you were so close you always wonder like should I done something different like should I've not done this or done a bit more of that or trained a bit differently and I think hindsights can be a wonderful thing but also a frustrating thing at the same time because especially when you want a different result you find so many different ways that you could have improved but at the same time like I've had I think is quite a successful career like National championships European championships World Championships com Games medal Olympic medal world record World hour record it's like it's been pretty awesome like like yeah you always you want more like every Rider does but it's been yeah amazing and at the same time like I've missed out on son manyy fun things not just in cycling but in life like I live in Andor and it's a lovely place to be but most of my family and friends are in the UK and you miss out on family occasions and trips away and just the fun time with your mates like down at the pp or if you go like a gravel Adventure or and like stage racing as well like I had a few few years of being a continental Rider and they were such awesome experiences because you're not stressed about like super high performance you just have like really fun experiences on a bike with your mates and that's kind of what I feel I missed and it's not a regret it's just I guess more what I'm looking forward to in the future that I can relax a little bit and not question every decision in my life is it going to make me faster or not it's a weird lens to run stuff true and you know I haven't done this dance and you know tried to make World hor and Fa spectacularly but for a long time like running every decision through that binary lens of will this make me a faster bike rider like I remember sitting in the cinema with my girlfriend at the time like eating spinach in the cinema I normalized that at the time like thinking no that's normal this is this is something people do but so especially with a French team now like what we know about Fuel and you know carbohydrate intake but I was with a French team and they were fanatical about weight so like you know I'm walking around now and I look like a pretty skinny dude I say walking around that 80 kogs I 68 in France totally hyper obsessed and it's it's not a part of sport that anyone really gets to see unless they're high performance but the opportunity cost to pursu in it whether you make it or not it is quite High yeah so many people don't make it as well and they have regrets for what they have missed because a lot that period as well as informative years when you're sort of 15 16 17 18 1920 I mean I'm really glad that I went to University and by the experience I had there were amazing and they may be who I am and I don't really regret the decision they made I'm quite glad that I approached psyching a little bit later in that respect but nowadays if you want to make it you can't you have to sacrifice those years and if you don't make it then it could be a bit of a a frustrating existence and even when you do make it it's not that World Tour cycling is this lovely dream like it is a a hard existence you ride your bike a lot you travel a lot you don't see your family and friends all that much it's um it can be quite challenging and especially if you're not achieving the performance you want to or you're in a bad team with a poor culture it could be pretty sound like putting that down on it but like just to try and like lift the lid a little bit that it's it's not all like champagne and roses and parties it is it's hard work and a lot of travel and can be yeah pretty challenging at the same time yeah I think high performance happens in the shadows yeah nobody sees what happens behind closed doors the work that goes into it but they obviously see the output and yeah I think I do do something I want to do with the future a little bit more of um so partnered with IMI The Institute mchan sharing to kind of show what the what you study at school how relevant that is to being a high performance practitioner if you're an aerodynamicist or a nutritionalist or an engineer or whatever role you have in a high performance environment that what you learned is actually important because that tangible link never really is discussed or shown in the public domain so I'm hopeful to try and create a system or project that kind of shows that in a bit more detail with the partners and the teams that are work with hopefully encourage them to do exactly the same because I feel there's a big big Missing Link there and we're lacking in a lot Engineers there Nemesis within hyperform support across the board so yeah that's kind of a big ambition mine I have the antidotes to your high performance I'm G to convince you to come bike packing with me next I'll be well to that bit fun it couldn't be less high performance it's beers in the evening and then you try and knock out 200k the next morning hung over to [ __ ] that was actually on my post Olympic agenda and annoyingly didn't actually fit in so I built a gravel bike literally two weeks before I went to the Olympics and there's a 370k gravel Loop in norfol where my wife parents live called Rebellion way and I've been Keen just to like firstly eye it up check it out and then hit it real hard for the fastest M time next year so that's that's high on the agenda we went I got back two weeks ago we went on Italy Albania Bosnia Slovenia Montenegro Croatia back in Italy like on the beer every night but then sort of 150 to 200k in the day end but we we tried to hit it pretty hard like we so it ended up be more of Team time tral during the day than it did whoever drank least the night before so it's like 10 minute turns 320 watts each swinging off team Pursuit St you will fit in for two I've served my time I don't need to do that my M text me G you haven't good phone it's like we haven't talked to each other in seven hours like we're just doing your turn and get back in the way well it's time two right yeah D I've enjoyed this La no it's been awesome thank you that thanks buddy if you enjoyed this conversation please click up here there's another video I know that you're absolutely going to love and click over here and subscribe to the channel so you don't miss any of our amazing upcoming guests

FREQUENTLY ASKED QUESTIONS

How did Dan Bigham break the UCI Hour Record?+

Dan Bigham set the Hour Record at 55.548 km by focusing on minimising aerodynamic drag rather than maximising raw power output. He engineered his position, equipment, and skinsuit choice to reduce CdA, arguing that cutting drag produces faster speeds than simply riding more watts.

How do dual-layer skinsuits like Vorteq work for cycling aerodynamics?+

Dual-layer skinsuits use ribbed fabric sandwiched between two layers of material on areas like the upper arms and lower legs. The texture keeps airflow attached to the body for longer, reducing the size of the turbulent wake behind the rider. Dan Bigham explains this delays flow separation in the same way dimples on a golf ball do.

What are the biggest aerodynamic gains left for cyclists?+

According to Dan Bigham, the largest remaining gains do not come from buying new products but from optimising the fit of equipment a rider already owns. Individual position changes tailored to a specific rider's body shape and flexibility consistently outperform off-the-shelf aero upgrades.

How can amateur cyclists audit their own aerodynamic setup?+

Bigham recommends systematically reviewing your riding position first, as it contributes the majority of your total drag. From there, assess how your kit fits on the bike rather than just off it, since fabric that bunches or lifts at speed creates significant additional resistance. Small, methodical changes tested one at a time will give you a clear picture of what is actually working.

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Key Takeaways

Q factor reduction (foot spacing) of just 10mm can deliver 1-1.5% drag reduction—worth 2-4 watts depending on speed. Small geometry changes have outsized aerodynamic effects when tested individually.

Most commercially available aero sensors now work well enough to tell you if setup X is faster than Y, even if absolute CDA values aren't perfectly accurate. Consistency and comparison matter more than hitting exact numbers.

Tire-wheel-frame-rider interactions are a massive optimization puzzle. Use simulation software like Best Bike Split or Aerotune to normalize manufacturer claims to your actual speed and conditions before buying.

The fastest aero suits are uncomfortable and trap heat; the most breathable ones sacrifice speed. Heat dissipation will become a performance limiter as races get hotter, especially in July in France.

Training consistency and volume trump equipment optimization for long-term gains. Dan's biggest regret from his early team days wasn't lack of gear—it was underrating the foundation of solid, repeatable training.

Marketing claims need scrutiny: check the testing speed (80km/h claims are often irrelevant), yaw angles tested, and whether data comes from simulation or actual wind tunnel protocols. Chat GPT can help you normalize claims to your conditions.

Expert Quotes

"I hate wattage claims. A lot of these solutions are individual so the result I would get if I changed a helmet or skin suit or a wheel crank set would be different to yours. How do you therefore advertise an improvement?"

"Most people listen to this don't know what Q factor is and so they're like 'who, I can reduce my Q factor, what the hell is that?' Marketing kind of bridges that gap."

"The biggest thing I would say is training consistency and it's something that I think collectively we probably underrated as a team. That's where the long-term improvements come from."

KEY QUOTES

“a 10 mm change in Q factor so literally 5 millim per side could be about a one one and a half% drag reduction which is like not an insignificant amount of Watts we're talking like two three four Watts depending on your speed and the cus crank can depends on what you're going from and to but you can get like 10 15 20 millimeters depending on your bottom bracket spec of of Q factor reduction and then that means you get not2 not3 not4 which could be up to like well individual Pursuit speeds you're talking 10 watts or so”
Dan Bigham — World Hour Record holder and aerodynamics specialist

“I hate watt claims uh I even I just dislike those kind of claims in general because a lot of these Solutions are individual so the result I would get if I changed a helmet or skin suit or a wheel CR set would be different to yours hopefully on the majority of it should be similar but it might not be and how do you therefore advertise an improvement because you as an engineer you you do the best you can to develop a faster component but it might not work for everybody”
Dan Bigham — World Hour Record holder and aerodynamics specialist

“the tire because it doesn't just do rolling resistance or just do Arrow or just do grip or just do damping does all of the above and the directions you go in for one optimization is not the same as another and then like I say you add in the wheel you add in the frame you add in the rider you ride the course the conditions is it wet is it dry is it hilly is it cobbly all that kind of stuff it's huge optimization problem”
Dan Bigham — World Hour Record holder and aerodynamics specialist

FREQUENTLY ASKED QUESTIONS

How did Dan Bigham break the UCI Hour Record?+

How do dual-layer skinsuits like Vorteq work for cycling aerodynamics?+

What are the biggest aerodynamic gains left for cyclists?+

How can amateur cyclists audit their own aerodynamic setup?+

HE ACCIDENTALLY MASTERED AERODYNAMICS | DAN BIGHAM

Key Takeaways

Expert Quotes

KEY QUOTES

Welcome and family life

Huub Wattbike team origins

Influencing UCI equipment rules

FREQUENTLY ASKED QUESTIONS

NEVER MISS AN EPISODE

READ THE GUIDE

RELATED EPISODES

MY BEST CYCLING PURCHASES

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MY BEST CYCLING PURCHASES

ROWE REVEALS WHAT ACTUALLY HAPPENED INEOS | RIDER SUPPORT

THE DAY MEG FISHERS LIFE CHANGED FOREVER

LIKED THIS EPISODE?

HE ACCIDENTALLY MASTERED AERODYNAMICS | DAN BIGHAM

Key Takeaways

Expert Quotes

KEY QUOTES

Welcome and family life

Huub Wattbike team origins

Influencing UCI equipment rules

FREQUENTLY ASKED QUESTIONS

NEVER MISS AN EPISODE

READ THE GUIDE

RELATED EPISODES

MY BEST CYCLING PURCHASES

ROWE REVEALS WHAT ACTUALLY HAPPENED INEOS | RIDER SUPPORT

THE DAY MEG FISHERS LIFE CHANGED FOREVER

RELATED CONTENT

MY BEST CYCLING PURCHASES

ROWE REVEALS WHAT ACTUALLY HAPPENED INEOS | RIDER SUPPORT

THE DAY MEG FISHERS LIFE CHANGED FOREVER

LIKED THIS EPISODE?

HE ACCIDENTALLY MASTERED AERODYNAMICS | DAN BIGHAM

Key Takeaways

Expert Quotes

KEY QUOTES

1.Welcome and family life

2.Huub Wattbike team origins

3.Influencing UCI equipment rules

FREQUENTLY ASKED QUESTIONS

NEVER MISS AN EPISODE

READ THE GUIDE

RELATED EPISODES

MY BEST CYCLING PURCHASES

ROWE REVEALS WHAT ACTUALLY HAPPENED INEOS | RIDER SUPPORT

THE DAY MEG FISHERS LIFE CHANGED FOREVER

RELATED CONTENT

MY BEST CYCLING PURCHASES

ROWE REVEALS WHAT ACTUALLY HAPPENED INEOS | RIDER SUPPORT

THE DAY MEG FISHERS LIFE CHANGED FOREVER

LIKED THIS EPISODE?

HE ACCIDENTALLY MASTERED AERODYNAMICS | DAN BIGHAM

Key Takeaways

Expert Quotes

KEY QUOTES

1.Welcome and family life

2.Huub Wattbike team origins

3.Influencing UCI equipment rules

FREQUENTLY ASKED QUESTIONS

NEVER MISS AN EPISODE

READ THE GUIDE

RELATED EPISODES

MY BEST CYCLING PURCHASES

ROWE REVEALS WHAT ACTUALLY HAPPENED INEOS | RIDER SUPPORT

THE DAY MEG FISHERS LIFE CHANGED FOREVER

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THE DAY MEG FISHERS LIFE CHANGED FOREVER

LIKED THIS EPISODE?

Welcome and family life

Huub Wattbike team origins

Influencing UCI equipment rules

Welcome and family life

Huub Wattbike team origins

Influencing UCI equipment rules