About Cycling Speed & Gear Ratio Calculator
Calculate road and gravel cycling speed from pedaling cadence (RPM), front chainring teeth, rear cassette cog teeth, and tire circumference. Computes gear ratio, gear inches, and meters of development per pedal stroke.
Key Capabilities & Features
- Calculates cycling forward speed in km/h and mph based on pedal RPM and gearing
- Gear inches and meters of development calculations per complete 360° pedal revolution
- Built-in tire circumference presets: Road 700x23c, 700x25c, 700x28c, Gravel 700x35c, MTB 29x2.25
- Full drivetrain ratio analysis (front chainring vs rear cassette cog)
How to Use Cycling Speed & Gear Ratio Calculator
Enter Cadence
Input pedaling revolutions per minute (RPM, e.g. 85-95 RPM).
Select Gearing
Set teeth for front chainring (e.g. 50T) and rear cassette cog (e.g. 17T).
View Road Speed
Inspect resulting forward velocity, gear inches, and development per pedal stroke.
Privacy & In-Browser Execution Guarantee
100% client-side calculation. Your data never leaves your browser.
Frequently Asked Questions
What is Gear Inches in cycling?
Gear inches represents the equivalent diameter of a direct-drive wheel (like a penny-farthing) that would cover the same distance per pedal revolution.
What is an optimal cycling cadence?
Most road cyclists maintain an efficient cadence between 80 and 95 RPM to minimize muscular fatigue and optimize cardiorespiratory efficiency.