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Bicycle Gear Inches Calculator

Calculate gear inches, development, and cadence-speed for any chainring and cog.

Bicycle Gear Inches Calculator

About this tool

Enter chainring teeth, cog teeth, wheel diameter, tire width, and cadence. Get gear inches, meters development, and speed at cadence. Matches r/bikewrench and r/cycling gear-ratio threads like 'too spinny on the flat'.

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