Wednesday evening. Six o'clock. A dual carriageway on the outskirts of town, flat and fast with a decent hard shoulder. Twelve riders gather at a car park, clip in without much ceremony, and within three minutes they are in a rolling line doing 38 km/h in through-and-off formation. Nobody checks a training plan. Nobody discusses target power. The session is the chain gang, and it has been making cyclists faster since long before anyone owned a power meter.
The chain gang is a peculiar institution. It exists across Britain and Ireland — almost every town with a cycling club has one, though you will not find it listed on any training app. It has no coach, no formal structure, and no entry criteria beyond showing up and being fit enough to hold on. And yet, for decades, it has been the single most effective training session available to amateur road cyclists. More effective than your Tuesday interval session. More effective than your Saturday solo threshold ride. Because the chain gang gives you something no solo ride can: race-specific fitness built inside a group, under pressure, with consequences for getting it wrong.
If you want the mechanics of through-and-off rotation, we covered that in detail in the pace line guide and the drafting and echelons guide. If you want general group riding rules, the etiquette guide has you sorted. This is different. This is about the chain gang as a training tool — how to use it deliberately, how to extract maximum fitness from it, and how to learn the craft of group racing that no indoor trainer will ever teach you.
What a Chain Gang Actually Is
A chain gang is not a club run with ambitions. It is not a sportive group that has decided to go a bit faster. It is a specific type of training session with a specific format: a group of riders doing sustained through-and-off rotation at threshold pace on a set route, usually out-and-back along a flat or gently rolling road.
The route matters. Chain gangs favour dual carriageways, ring roads, bypasses — roads where traffic is predictable, there are no junctions to break the rhythm, and the group can roll for 30 to 50 minutes in one direction without stopping. The out-and-back format means the group rides hard into a headwind on the way out and benefits from a tailwind on the return, or rides crosswind both ways. Either way, the route is consistent week to week, which means your effort is comparable week to week.
The pace matters, too. A good chain gang sits at or just below the group's collective threshold — the effort level that is hard enough to produce a training stimulus but sustainable enough that the session lasts 60 to 90 minutes. For most club-level chain gangs in the UK and Ireland, that means an average speed of 35 to 42 km/h on flat roads. Faster groups exist. Slower ones, too. The number is less important than the principle: the pace should be hard but holdable for the session's duration.
What makes it a chain gang rather than just a fast group ride is the rotation. Riders take turns on the front for short intervals — 15 to 30 seconds is typical — before peeling off and recovering in the line. The rotation is continuous. The group moves as a single unit. Nobody attacks. Nobody surges. Nobody sits on unless they have communicated it. The whole thing runs on cooperation, and it falls apart the moment anyone decides to turn it into a race.
The Fitness Baseline: Are You Ready?
Here is what catches most first-timers off guard about chain gangs: turning up too early is worse than turning up too late.
If you arrive at a chain gang without the fitness to sit in the group, you will spend the entire 90 minutes in oxygen debt, hanging desperately onto a wheel, learning absolutely nothing except what it feels like to suffer. You will not absorb any skills. You will not read the group. You will not manage your effort. You will survive or you will not, and either way you will have got nothing from the session that you could not have got from a solo threshold ride where you actually controlled the intensity.
The baseline you need: you should be able to hold 75 per cent of your FTP for 40 to 60 minutes. Not in theory. Not on a good day with fresh legs and a tailwind. As a repeatable effort on a Wednesday evening after a day of work. If your FTP is 250 watts, that means sustaining around 190 watts for the session. If the chain gang averages 38 km/h and that pace requires your absolute maximum effort, you are not ready.
This is fixable. Two to three months of structured solo work will get most riders there. Two threshold sessions a week — 2x20 minutes at FTP, or 3x15, or whatever format suits you — combined with your regular endurance rides. Build the engine first. Then bring that engine to the chain gang and use the group to sharpen it.
The temptation is to join early and hope the group pulls you along. It will not. The group will expose exactly where your fitness falls short, and it will do so publicly.
How Through-and-Off Works in a Chain Gang
The mechanics of through-and-off are covered properly in our pace line guide, so I will not repeat the basics here. What I want to talk about is how through-and-off works differently in a chain gang context versus a Sunday club run.
On a club run, the rotation is relaxed. Pulls are long — a minute, two minutes, sometimes longer. The pace is conversational. There is room for error. In a chain gang, the rotation is rapid and the margins are smaller. Pulls are 15 to 30 seconds. The pace sits right at threshold. Any disruption — a hesitation at the front, a gap in the line, a rider who surges — ripples through the entire group within seconds.
The critical difference is that in a chain gang, your pull on the front should feel like the same effort as sitting in. That sounds wrong. The front is where you are in the wind, doing the work, exposed. But here is where it gets really interesting: the effort increase from sitting in a draft to riding on the front at the same speed is only about 30 to 40 per cent more power. In a chain gang where you are on the front for 20 seconds and recovering for two to three minutes, the average effort across the session evens out. The front pull is not the hard part. The hard part is maintaining that effort across 90 minutes as fatigue accumulates.
When you peel off the front, you do not stop pedalling. You ease off the power by 20 to 30 watts, drift across to the retreating line, and let the speed differential between the two lines carry you back. Light pedalling. Smooth transition. If you freewheel, your speed drops unpredictably and the rider behind you in the retreating line has to adjust. If you brake, something has gone badly wrong.
At the bottom of the retreating line, you slot across to the advancing line without losing speed. This is where gaps form — the transition from retreating to advancing. Watch the rider ahead of you. When they move across, wait half a second, then follow. Close the gap gradually. Not with a sprint. A smooth acceleration of five to ten watts that brings you back onto the wheel ahead.
Positioning and Effort Management
Most riders assume the back of the line is the easy spot. It is not. It is the hardest position in the chain gang.
Every small fluctuation at the front of the line amplifies as it travels backwards. A five-watt surge from the front rider becomes a ten-watt surge for the rider in fifth position and a twenty-watt surge for the rider in tenth. This concertina effect — the elastic band stretching and snapping — means the riders at the back are constantly chasing, easing, chasing, easing. Their effort is more variable, more anaerobic, and more fatiguing than the riders near the front, where the pace is steady.
If you are new to a chain gang, sit in the front third of the line. Counter-intuitive, I know. You feel safer at the back where nobody can see you struggling. But the front third is where the pace is smoothest, where you have the most time to react to changes, and where your effort is the most predictable. The back of the line is where the fittest, most experienced riders sit — because they have the fitness to absorb the surges and the experience to read when a gap is about to open.
Effort management is the entire skill of chain gang riding. Not power. Not speed. Management. Your power on the front should be close to your power in the line. If you are riding at 200 watts in the draft and 320 watts on the front, you are pulling too hard. You should be at 200 watts in the draft and 260 to 280 on the front — just enough additional power to maintain the group's speed against the wind. The pace stays constant. Your effort fluctuates within a narrow band.
Wind direction changes the dynamic. In a headwind, front pulls are harder because you are fighting the wind at full pace. In a crosswind, the sheltering effect of the line is reduced and everybody works harder. In a tailwind, the group speeds up but the relative effort of pulling through is lower. A canny chain gang rider adjusts their pull length to the conditions: shorter pulls into a headwind, standard pulls in a crosswind, and longer pulls with a tailwind when the effort difference between front and line is minimal.
Le Metier: The Craft You Cannot Learn Alone
The French have a term for the accumulated skill of professional racing: le metier. It translates as "the trade" or "the craft." It means the thousand small things a rider learns through years of racing in a group — things that cannot be taught in a classroom, written in a training plan, or practised on a turbo trainer.
Le metier is knowing that the rider three positions ahead of you is about to crack because you can see their cadence dropping and their shoulders tensing. It is moving up the line before a hill because you know the pace will surge and gaps will open and you do not want to be at the back when they do. It is sensing the rhythm of the rotation speeding up and knowing the group is about to lift the pace, so you soft-pedal for ten seconds to store a few matches before the effort rises.
Tim Kerrison, the performance director at Ineos, has talked about how even professional riders with extraordinary physiological data still need le metier to turn that fitness into results. The power numbers get you to the race. The craft gets you through it.
The chain gang is where amateur riders learn this craft. Not all of it — real le metier requires real racing — but a significant amount. You learn to read body language. You learn which riders in the group are reliable and which ones surge. You learn to anticipate rather than react. You learn that the smoothest rider in the group is not always the strongest but is always the most effective.
Here is where it gets really interesting for masters riders specifically. After 40, your physiological ceiling starts to come down. VO2max declines. Recovery takes longer. Peak power erodes. But le metier only gets better with years of practice. A 45-year-old with 15 years of chain gang experience can hold the wheel of a 25-year-old with 50 more watts of FTP — because the older rider uses 20 per cent less energy through better positioning, better anticipation, and better effort management. The gap between what your body can produce and what your brain can save is where experienced masters riders live.
You cannot learn any of this on Zwift. You cannot learn it riding solo on a quiet road with your power meter telling you what to do. You learn it in the chain gang, week after week, reading the group, making mistakes, getting it wrong, and gradually getting it right.
Using the Chain Gang as Structured Training
Most riders treat the chain gang as a session that happens to them. They turn up, hold on, and whatever fitness falls out of it is a bonus. That is leaving performance on the table.
The chain gang is a threshold session. Treat it like one. Plan your week around it. The session itself sits in your training week the way a hard interval session would — it is your key midweek intensity. That means the day before should be easy or rest. The day after should be recovery or easy endurance. Do not ride a hard interval session on Tuesday and then a chain gang on Wednesday. You will be too fatigued to get the training stimulus from either.
A well-planned training week with a chain gang as the centrepiece might look like this: Monday rest, Tuesday easy endurance, Wednesday chain gang, Thursday recovery spin, Friday off or easy, Saturday endurance with some tempo, Sunday long ride. The chain gang replaces your midweek threshold session. You do not need both.
During the chain gang itself, you can be more deliberate than just surviving. Set yourself specific targets for each session. This week: hold the front third of the group for the entire outward leg. Next week: take every pull without skipping a turn. The week after: focus on reducing your power variability — keep your normalised power within five per cent of your average power for the session.
Your power meter and heart rate data after a chain gang tell you things your solo rides cannot. Look at your average and normalised power. If your normalised power is significantly higher than your average power (a variability index above 1.10), you are riding too reactively — chasing surges, braking, accelerating. Work on smoothing that out. If your average heart rate for the session is above 90 per cent of your maximum for the full duration, you are redlining and need to manage your effort better — or the chain gang is still too fast for you.
Over a season, the chain gang acts as a weekly fitness test without you needing to do a formal one. Your position in the group will tell you everything. In January, you might be hanging on at the back. By April, you are sitting in the front third and taking full pulls. By July, you are setting the pace. That progression — visible, tangible, measured against the same riders on the same road — is more motivating than any number on a screen.
When You Get Dropped
You will get dropped. Every chain gang rider gets dropped. It is not a matter of if, it is a matter of when — and what you do next matters more than the fact that it happened.
The first instinct when a gap opens is to sprint to close it. Resist that. An all-out sprint to bridge a ten-metre gap will cost you 30 to 60 seconds of recovery, and if the chain gang does not ease up, you will open another gap within two minutes because you spent everything closing the first one.
Instead, if a gap opens, make a hard but controlled effort to close it. Ten to fifteen per cent above the pace you were holding, sustained for 15 to 20 seconds. If the gap closes, you are back in. If it does not close, the gap is growing because the group is riding faster than you can sustain, and no amount of chasing will fix that.
Once you accept that you are off the back, switch to plan B. Maintain a hard but sustainable effort — 85 to 90 per cent of your FTP — and ride the rest of the route solo. If the chain gang does an out-and-back, you will often pick up riders on the return leg as the group comes back towards you, or you rejoin when the group regroups at the turnaround point. Either way, you still get a quality threshold session. Just not the one you planned.
The good news is that getting dropped is information. Pure, honest information. It tells you exactly where your fitness sits relative to the group on that day, with that fatigue, in those conditions. If you get dropped in the last ten minutes, you are close — another month of threshold work and you will hold on. If you get dropped in the first twenty minutes, you are not ready yet. Go back to the solo work, build the engine, and come back when you can hold on longer.
Do not let ego keep you away from the chain gang because you got dropped once. The riders who improve fastest are the ones who get dropped, analyse why, do the work, and come back.
Safety and Etiquette
Chain gang etiquette overlaps heavily with general group riding etiquette — we covered the full set of rules in the group ride etiquette guide. But there are a few things specific to the chain gang context that are worth stating clearly.
Hold the group's pace on the front. Not your pace. The group's pace. If the chain gang is rolling at 38 km/h and you pull through at 42, you have not done the group a favour. You have forced every rider behind you to close a gap when you fade, disrupted the rotation rhythm, and burned matches that other riders needed for the rest of the session. The fastest way to get yourself uninvited from a chain gang is to surge on the front.
Signal your intentions. A flick of the elbow when you are pulling off. A raised hand before you sit up. A shout of "slowing" if something unexpected happens. In a chain gang at 38 km/h with 30 centimetres between wheels, the riders behind you are trusting you with their safety. Respect that trust.
Do not overlap wheels. Ever. This is non-negotiable in any group riding context, but in a chain gang where the pace is high and riders are fatigued, the consequences of a wheel touch are severe. If you cannot hold a wheel without overlapping, you need more practice at lower speeds before joining a fast chain gang.
Point out hazards early. Potholes, drains, debris, parked cars. The riders behind you are focused on the wheel ahead of them and the rotation — they are not scanning the road surface 50 metres ahead. That is your job when you are near the front.
If a rider is struggling, do not attack them. The chain gang is cooperative training. If someone is cracking, the group either eases the pace for a few minutes or lets them sit on. Nobody benefits from turning the chain gang into an elimination race — the strong riders lose their training partners, and the struggling rider learns nothing except that the group is not worth coming back to.
Finding and Joining Your First Chain Gang
Most chain gangs are invisible unless you know where to look. They are not advertised on Meetup or listed on cycling apps. They exist through word of mouth, club websites if you are lucky, and the simple act of asking.
Start at your local cycling club. Ask at the club run: "Is there a midweek chain gang?" If the club has one, someone will point you in the right direction — where it starts, what time, what the expected pace is. If the club does not have a formal one, ask if any riders do a regular fast group session midweek. Chances are, they do.
If you do not have a club, look for riders. Midweek evenings in summer, if you see a line of eight to twelve riders in matching or mismatched kit rolling through-and-off on a main road, that is a chain gang. Note the route. Next week, be at the start point.
Your first session should be about observation, not performance. Tell the group you are new. Ask where to sit. Sit in for the first few laps and watch how the rotation works — when riders pull off, how long they pull for, which side they peel off to. Take short pulls when you feel ready. Nobody expects a new rider to drive the group on their first night.
Bring the right equipment. Road bike, not gravel or hybrid. Lights if the session runs into dusk — and in a British or Irish summer, a 7pm chain gang absolutely can. Helmet. No headphones. No aero bars. And a rear light even in daylight, because the group will be riding on roads with traffic.
The social element of the chain gang matters more than people give it credit for. These become your training partners. The riders you see every Wednesday evening for six months — through rain, wind, the dark evenings of early spring and the long light of midsummer. You learn each other's strengths and weaknesses. You know who will crack on the hill and who will be driving the pace at the end. You develop the kind of trust that only comes from spending hundreds of hours on someone's wheel.
That community is the chain gang's real product. Not the fitness, though you will get plenty of that. Not the skills, though you will build those too. The community. Twelve riders who turn up every week because the session is good and the company is better. That is what keeps you coming back through the dark months when the turbo trainer is calling and the rain is horizontal and your legs are tired from the week.
The chain gang has survived every technological shift in cycling training. Power meters did not replace it. Smart trainers did not replace it. AI coaching did not replace it. Because nothing replaces the experience of riding at threshold in a group of people who are all working together to make each other faster. That is the chain gang. It is the oldest structured training session in cycling, and it is still the best.
The Roadman community is full of riders who have been through their first chain gang and come out the other side. Join the conversation at https://www.skool.com/roadmancycling.