Cadence gets treated like a personality trait. Some riders identify as spinners. Others are grinders. Ask either camp for a number and you get conviction without much reasoning behind it. The truth is less tribal and more mechanical: cadence is the product of gearing, speed, and wheel size, and its physiological effects depend on fibre type, aerobic capacity, and how long you plan to be on the bike.
This is what actually determines the RPM you should pedal at — and why copying someone else's number, whether a pro or a club mate, is rarely the right move.
What cadence actually is
Cadence is pedal revolutions per minute. That sounds simple, but behind the number sits a mechanical chain. Every pedal revolution turns the chainring once. The chain transfers that rotation to the rear cassette cog, and the ratio between chainring teeth and cog teeth determines how many times the rear wheel turns for each pedal revolution. That is the gear ratio.
Gear ratio = chainring teeth / cassette cog teeth.
On a 52-tooth chainring paired with a 17-tooth cassette cog, one pedal revolution turns the rear wheel 3.06 times. Each wheel revolution covers the tyre's circumference — for a standard 700x25c tyre, that is approximately 2,111 mm (2.111 metres).
So the formula linking speed and cadence is:
Cadence = Speed (mm/min) / (Wheel circumference x Gear ratio)
Work it backwards: at 30 km/h, you cover 500,000 mm per minute. Divide by wheel circumference (2,111 mm) and gear ratio (3.06), and you get approximately 77 RPM. Drop to a 52/15 gear at the same speed and cadence rises to about 91 RPM. The numbers shift with every gear change, every gradient, every acceleration.
This is the point most cadence advice skips over. You do not choose a cadence in isolation. You choose a gear, a speed results, and cadence is the consequence. Controlling cadence means controlling gear selection — which means the cassette range on your bike determines the cadence options available to you on any given road.
The Cadence Calculator will run these numbers for your specific setup.
The biomechanics of pedalling speed
What happens inside your legs at different RPMs is where the real trade-off lives. Every pedal stroke applies force to the cranks. Power equals force multiplied by cadence (technically, torque multiplied by angular velocity). For a fixed power output — say 200 watts — a lower cadence demands more force per stroke, and a higher cadence demands less.
That force difference changes which muscle fibres do the work.
Low cadence (60-75 RPM) requires high torque per stroke. High torque preferentially recruits Type II (fast-twitch) muscle fibres, which produce large forces but fatigue faster and run primarily on glycogen. A rider grinding at 65 RPM at 200 watts is applying roughly 50% more force per stroke than a rider spinning at 95 RPM at the same power. Over two hours of climbing, that force accumulation matters. The Type II fibres fatigue, glycogen stores drain faster, and the legs start to feel like concrete.
High cadence (95-110 RPM) reduces per-stroke force and keeps the load on Type I (slow-twitch) fibres, which are more fatigue-resistant and burn a higher proportion of fat. The cost is cardiovascular: rapidly contracting muscles need rapid blood supply. Heart rate climbs. Oxygen consumption rises. The rider spinning at 105 RPM at 200 watts will show a higher VO2 and heart rate than the same rider at 75 RPM and the same power.
The trade-off is muscular fatigue versus cardiovascular cost. For short efforts, muscular fatigue is irrelevant and low cadence can be more efficient. For long efforts, muscular fatigue is the limiter, and higher cadence preserves the legs at the expense of a heart rate that is 5-10 beats higher. Over a four-hour ride, the heart does not fatigue the way quadriceps do.
What the research says
Three studies frame the practical picture.
Lucia et al. (2004) studied professional cyclists and found that their self-selected cadence during racing and training sat close to their individually optimal metabolic rate. When researchers forced pros to ride at cadences 15-20 RPM above or below their preferred rate, oxygen cost increased in both directions. The conclusion: trained cyclists have already calibrated their cadence to something close to optimal through years of riding, and artificial manipulation rarely helps.
Hansen et al. (2002) tested trained cyclists at freely chosen cadence and at fixed cadences of 60, 80, 100, and 120 RPM, all at the same power output. Freely chosen cadence clustered between 80 and 90 RPM. Deviations of 20 RPM or more in either direction increased VO2 at every power level tested. The metabolic penalty for pedalling too fast was roughly equal to the penalty for pedalling too slow — the body pays for extremes in both directions.
Foss and Hallen (2005) added an important nuance. At moderate intensities (below lactate threshold), the energetically optimal cadence — the one that minimised oxygen cost — was lower than the freely chosen cadence. Riders preferred to spin a bit faster than strict metabolic efficiency dictated. But as intensity rose toward threshold and above, the gap narrowed, and freely chosen cadence converged with the energetically optimal rate. At high power outputs, the body's preference and the laboratory optimum agreed.
The practical conclusion from all three: self-selected cadence is a reasonable starting point. It is not sacred. Riders who have never deliberately trained cadence — who fell into 70 RPM because they started riding in a hilly area on a narrow-range cassette — may be stuck at a suboptimal rate. The body calibrates, but only within the range it has been exposed to. If you have never spent structured time at 90-95 RPM, your self-selected cadence reflects habit, not optimisation.
Why pros pedal faster
The average WorldTour rider holds a cadence between 90 and 100 RPM during stage races. On long climbs, the range tightens to 85-95 for most, though individual variation is substantial. Why do they spin faster than the 80-85 RPM typical of strong amateurs?
The answer is VO2max.
A professional grand tour rider typically carries a VO2max above 80 ml/kg/min. That means his cardiovascular system can deliver, process, and utilise oxygen at a rate far beyond what a club cyclist with a VO2max of 50 ml/kg/min can manage. Higher cadence costs more oxygen, as the research confirms. But a rider with 80 ml/kg/min of aerobic headroom can absorb that cost without approaching his ceiling. The return is significant: muscular fatigue accumulates more slowly, glycogen depletion is spread across more pedal strokes at lower force, and after five hours of racing the legs are still capable of responding to attacks.
Chris Froome's climbing cadence drew attention during his early Tour de France victories. Pedalling at 95-100 RPM on Alpine cols where others ground at 80 RPM looked awkward on camera. It was also effective — his exceptional aerobic engine could handle the cardiovascular cost, and his legs arrived at the summit less fatigued than riders who had been pushing higher forces at lower cadences for the same duration.
The lesson for amateur riders is not that higher cadence is better. It is that higher cadence is only better if your aerobic system can support it. Copying Froome's RPM without Froome's VO2max means your heart rate spikes toward maximum, your breathing becomes ragged, and the cardiovascular cost outweighs the muscular benefit. An amateur with a VO2max of 50 ml/kg/min pedalling at 95 RPM on a climb may be working at 90% of aerobic capacity where a pro at the same cadence sits at 70%.
There is also a duration component. During shorter efforts — a 20-minute time trial, for instance — the muscular benefit of higher cadence matters less because the muscles do not have time to fatigue deeply. Time trialists often ride at 80-88 RPM, slightly below road-race cadence, because the event is short enough that muscular fatigue is not the limiter and the reduced cardiovascular cost of a slightly lower cadence preserves aerobic margin for sustained power. Over a five-hour stage, the calculus reverses — preserving the legs becomes paramount, and the cardiovascular cost of higher cadence is a price worth paying.
Train your aerobic capacity first. Cadence options expand as fitness improves.
How cadence changes with terrain
On flat roads at constant power, gear selection gives you full control over cadence. Shift up, cadence drops; shift down, it rises. Most riders settle into their preferred range without thinking about it.
Climbing changes the equation. Gravity slows speed. At the same gear, reduced speed means reduced cadence. The rider who pedals at 90 RPM on the flat at 34 km/h in a 52/17 will see cadence drop below 60 RPM on a 10% gradient at 12 km/h in the same gear — which is why shifting matters.
Most riders shift to an easier gear on climbs, but they still end up 5-10 RPM below their flat-road cadence. This is normal and, according to the research, efficient. Climbing cadence tends to sit between 75 and 85 RPM for trained amateurs and 80-95 RPM for professionals. Forcing flat-road cadence on a steep climb requires a very light gear — a 34/32 or 34/34 combination — and the rapid leg turnover at low speed introduces internal energy losses from the increased rate of muscle contraction without proportional forward motion. The body seems to know this, which is why cadence naturally settles lower on gradients.
Descending flips the problem. Speed climbs, and in the same gear, cadence can exceed 120 RPM. Spinning out — where your legs cannot keep up with the pedals — is a sign that you need a bigger gear or should simply coast. Pedalling above 120 RPM for most riders produces more bouncing on the saddle than useful power, and the neuromuscular coordination required to apply force smoothly at that speed is a skill few amateurs have trained.
The practical pattern: ride 85-95 RPM on the flat. Accept 75-85 RPM on climbs. Shift into bigger gears on descents to keep cadence below 110 RPM. Adjust within those bands by feel. The terrain dictates the range; your job is to pick the gear that keeps you inside it.
Cadence drills that work
Expanding your comfortable cadence range requires deliberate practice — riding at RPMs that feel slightly wrong until they feel normal. Three drills, done once a week during base season, cover the spectrum.
Single-leg drills. Unclip one foot and rest it on the trainer frame (or on the back of the shoe for outdoor riders using a very light gear). Pedal with one leg for 30 seconds, then switch. The point is not power production. The point is exposing the dead spots in your pedal stroke — the top and bottom of the circle where most riders apply no force or actively resist the pedal. You will feel the clunk at the top and the drag at the bottom immediately. Focus on pulling through the bottom of the stroke and pushing over the top. Three sets of 30 seconds per leg, with two minutes of normal pedalling between sets.
Spin-ups. Start at your normal cadence — say 88 RPM — and gradually increase over 30 seconds to the highest RPM you can hold without bouncing on the saddle. Note the RPM where your form breaks down: hips rocking, upper body swaying, loss of smooth pedal pressure. That is your current ceiling. Repeat five times with two minutes of easy spinning between efforts. Over weeks, that ceiling rises. A rider who breaks down at 110 RPM in January may hold clean form at 125 RPM by March.
Low-cadence torque intervals. Find a moderate climb (4-6% gradient). Shift into a gear that drops cadence to 50-70 RPM and ride at Zone 3 to Zone 4 power for 3-5 minutes. Stay seated. Keep your upper body still — no rocking, no pulling on the bars. This builds muscular endurance and improves your ability to produce force at low RPMs without burning through glycogen at an unsustainable rate. Three to five repetitions with three minutes of easy spinning between each. You can also build your own interval sessions with cadence targets baked in. For more on structuring these sessions, see the torque intervals guide.
These drills work because they expand range in both directions. The goal is not to ride at a fixed number but to be comfortable and efficient anywhere from 60 to 110 RPM, so that terrain and effort — not habit — determine your cadence.
Gear selection and cadence
Your cassette range sets the boundaries of your cadence options. This is the part of the equation that costs money instead of effort, and riders routinely get it wrong by choosing cassettes that are too narrow for the terrain they ride.
Consider a rider on a compact crankset (50/34) with an 11-28 cassette. On a 10% gradient at 12 km/h in the easiest gear (34/28), cadence works out to approximately 66 RPM. That is grinding territory — high force per stroke, rapid Type II fibre fatigue, burning legs before the climb is half done.
Swap that cassette for an 11-32 and the same rider, same climb, same speed, now pedals in a 34/32 at about 58 RPM in the easiest gear — still low, but the 34/30 option at 62 RPM or the ability to drop cadence less aggressively in the 34/28 changes the available range. Move to an 11-34 cassette and the spread opens further: the 34/34 gear at 12 km/h puts cadence at about 55 RPM, but more importantly, the intermediate gears (34/30, 34/32) sit at cadences between 58 and 62 RPM, giving the rider meaningful options in the 65-75 RPM range on steep terrain rather than one gear that is too hard and nothing below it.
The point is not the extreme low gear. The point is the spacing between gears and whether that spacing allows you to find a cadence in the right range for your fitness on the gradients you actually ride. A rider who lives in the Alps and climbs 1,500-metre passes needs different gearing than a rider who trains on the flat fenlands of East Anglia. Both may have identical power profiles, but their cadence requirements differ because the terrain demands different gear ratios.
The Gear Ratio Calculator will map out your full gear range, and the Cadence Calculator will show you what RPM each gear produces at any speed. Run the numbers before buying a new cassette.
One further note: electronic groupsets with wireless shifting have made closer-ratio cassettes more popular because the shifting is so precise. That precision is wasted if the range does not cover the terrain. A beautifully spaced 11-28 cassette with perfect 1-tooth jumps is inferior to an 11-34 with larger jumps if you ride 15% gradients and the 11-28 forces you to grind at 55 RPM on every steep pitch. Choose range first, spacing second.
The bottom line
Cadence is not a number to fetishise. It is a byproduct of gear selection, terrain, speed, and physiology. The research consistently shows that your body is a reasonable judge of the right RPM — but only within the range you have trained. Three principles cover most of what matters:
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Train in the 85-95 RPM range on flat terrain and let climbing cadence drop 5-10 RPM naturally. This is the window where most cyclists balance muscular fatigue and cardiovascular cost most effectively. If you currently sit at 75-80 RPM by default, gradually work upward by 5 RPM every two to three weeks.
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Do cadence drills weekly to expand your comfortable range in both directions. Single-leg drills, spin-ups, and low-cadence torque intervals develop the neuromuscular control and muscular endurance that let you produce power across a wide RPM band. A rider who can only pedal efficiently at 82-88 RPM is constrained in a way that a rider comfortable from 65 to 110 RPM is not.
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Choose your cassette based on the terrain you actually ride. There is no prize for grinding a narrow-range cassette up a mountain. If your local climbs regularly force cadence below 65 RPM, your gearing is wrong, not your legs. A wider cassette range — 11-32 or 11-34 — gives you the gear options to keep cadence in a productive range on steep roads.
Cadence is a tool, not an identity. Use it with the same precision you apply to power, nutrition, and pacing. The number on the screen should change with the road, the effort, and the duration — not stay locked because someone on the internet told you that 90 RPM is the answer. If you want to see exactly what RPM each of your gears produces at a given speed, run your setup through the Cadence Calculator and make decisions from real numbers rather than guesswork.