Sports

Bike Gear Calculator

Find gear inches and development from your gearing.

Calculated Output

Gear inches 96.429

Development 7.695

Formula: gear inches = (chainring ÷ cog) × wheel diameter

Step-by-Step Breakdown

1. Values used:

2. Chainring teeth = 50

3. Rear cog teeth = 14

4. Wheel diameter = 27

6. Gear inches = 96.429

7. Development = 7.695

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The math behind it

gear inches = (chainring ÷ cog) × wheel diameter. Development = the distance traveled per pedal revolution.

50/14, 27 in wheel → 96.4 gear inches.

Higher gear inches?

A harder, faster gear (more distance per pedal stroke).