Gear ratio calculator

Calculate gear ratio, gear inches, development and speed by cadence.

Chainring (teeth)Cassette cog (teeth)Wheel and tireCadence (rpm)

Gear ratio

3.33

chainring / cassette

Gear inches

89.2

classic measure

Development

7.12 m

distance per pedal stroke

Speed

38.4 km/h

at 90 rpm