CADENCE CALCULATOR

Formula:Gear Ratio = Chainring Teeth / Cog Teeth. Speed (mm/min) = Cadence × Wheel Circumference (mm) × Gear Ratio. Convert mm/min to km/h by multiplying by 60 and dividing by 1,000,000. To reverse — from speed to cadence — divide speed in mm/min by the product of circumference and gear ratio.

Cadence biomechanics:A slow cadence means high torque per pedal stroke, which recruits more Type II (fast-twitch) muscle fibres and generates greater muscular fatigue per revolution. A fast cadence reduces torque per stroke but shifts the metabolic burden toward the cardiovascular system — the heart and lungs work harder to service rapid, lighter contractions. The trade-off between muscular and cardiovascular cost is why cadence preference is so individual: it depends on your fibre-type distribution, aerobic capacity, and the duration and intensity of the effort.

The Armstrong effect:Lance Armstrong popularised high-cadence riding in the early 2000s, spinning at 100–110 RPM in the mountains when his rivals were grinding at 70–80. The cycling world took notice, and higher cadences became fashionable across the amateur peloton. But the research published since then — including work by Lucia, Marsh, and Foss — shows that self-selected cadence typically approximates the metabolically optimal rate for a given individual. The trend toward higher cadence among professionals reflects their exceptional aerobic capacity (enabling them to absorb the cardiovascular cost of fast spinning), not a universal prescription. Copying a pro's cadence without their engine is borrowing a solution to someone else's problem.

Optimal cadence varies:Fitness level, effort type, terrain, bike fit, and individual physiology all influence where your most efficient cadence falls. A time triallist holding threshold might sit at 85–95 RPM. A sprinter winding up for the line might hit 120+. A climber on a steep gradient might drop to 70. There is no single correct number — only ranges that are more or less appropriate for the context. The calculator gives you the mechanical relationship between your gearing, speed, and cadence; the interpretation depends on you, your fitness, and the ride.

Last updated: July 2026 · Tool version 1.0