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⚙️ Cycling Gear Ratio Calculator

Calculate gear ratios, speed, and meters of development for any bike setup. Enter your chainring and sprocket teeth, wheel size, and cadence to see your full cassette table.

Cassette Presets
Typical: 70–100 RPM
Single Gear Result
Full Cassette Table

Speed (km/h) at selected cadence. 🟡 Low gear · 🟢 Mid range · 🔵 High gear