Bike Gear Ratio Calculator

Ingresar cálculo

Chainring Teeth:

Cog Teeth:

Wheel Diameter (inches):

Resultados

Input	Value
Chainring Teeth
Cog Teeth
Wheel Diameter	inches

Result	Value
Gear Ratio
Gear Inches
Development	feet
Speed at 90 RPM	mph

Understanding the Results:

• Gear Ratio: The number of turns the rear wheel makes for each pedal revolution. Higher ratio means harder pedaling but more speed.
• Gear Inches: A traditional measure of gear size. It represents the diameter of an equivalent direct-drive wheel.
• Development: The distance traveled in one complete revolution of the pedals.
• Speed at 90 RPM: The theoretical speed when pedaling at 90 revolutions per minute.

With the current setup ( teeth chainring and teeth cog), for every complete pedal rotation, the rear wheel turns times.