Why is wheel RPM useful?

Wheel RPM is needed for setting up bike computers, calibrating speed sensors, and understanding drivetrain behaviour at different speeds.

How fast do bike wheels spin?

At 30 km/h with 700x25c tyres, wheels spin at about 237 RPM or roughly 4 rotations per second.

Does tyre pressure affect wheel speed?

Higher tyre pressure slightly reduces tyre deformation, marginally decreasing the effective circumference. The effect on wheel RPM is very small (less than 1%).

BikeCalcs

Wheel Speed Calculator — Wheel RPM from Road Speed

Calculate how fast your wheels spin at any road speed.

Road Speed

Wheel Circumference

700x25c = 2105mm

How We Calculate This

Wheel RPM Formula

Wheel RPM = (Speed in m/s) / (Wheel Circumference in m) x 60

First, speed is converted from km/h to metres per second. Then it is divided by the wheel circumference to get rotations per second, multiplied by 60 for RPM.

Frequently Asked Questions

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Last updated: 2025-02-20

All calculations are estimates. Always verify results and consult a professional bike fitter where appropriate.