Analyze gear ratios, gear inches, and potential speed based on your drivetrain and cadence.
Drivetrain Specs
teeth
teeth
RPM
mm
Common Tires
Gearing Analysis
Enter gearing and cadence to see analysis.
About this calculator
Overview
Gear selection significantly impacts a cyclist's efficiency and speed. This calculator helps you understand exactly how much distance you cover per pedal stroke.
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Pro Tips
A moderate cruising gear usually sits around 70 gear inches.
Sprinting gears often exceed 100 gear inches.
Meters development (or roll-out) is how far the bike travels with one full turn of the pedals.
Changing your rear cog by just 1 tooth has a larger effect than changing your front chainring by 1 tooth.
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Fun Facts
"The term 'Gear Inches' comes from the diameter of the large front wheel of a high-wheeler (penny-farthing)."
"Fixed-gear riders often choose a '48x17' ratio for a balance of speed and skid patches."
"Modern 1x drivetrains use very large rear cogs to provide similar range to older triple-chainring systems."
