Bike Gear Calculator

Calculate gear ratio and gear inches

Note: Gear Ratio = chainring ÷ cog. Gear Inches = ratio × wheel diameter (in).

Drivetrain

Chainring Teeth

Cog Teeth

Wheel Diameter (in)

⚠️ For educational and training purposes only. Consult a coach, physician, or certified trainer before making training or health decisions.

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