Professional Bicycle Gear Ratio Calculator
Calculate bicycle gear ratios, analyze speed and cadence performance, and optimize your cycling drivetrain with our comprehensive professional tool.
Gear Configuration
Chainring Configuration
Set number and teeth count of chainrings
Cassette Configuration
Set number and teeth count of cassette cogs
Wheel Settings
Configure wheel size and tire size
mm
700mm + 25mm×2 = 750mm
Saved Configurations
Gear Ratio Knowledge
Learn about bicycle gear ratios and cycling performance
Bike Gear Ratio Chart
Current Configuration
Gear Distribution Analysis
Gap Color Legend:
≤12% (Ideal)
12-18% (Good)
18-25% (Acceptable)
>25% (Large)
Performance Analysis
Cadence Range Adjustment (RPM)
Unit System:
60 RPM 130 RPM
Low-speed gear (<20 km/h)
Medium-speed gear (20-35 km/h)
High-speed gear (35-50 km/h)
Extreme-speed gear (>50 km/h)
Table Description: The table shows speeds for different chainring-cassette combinations at various cadences. Calculations include wheel size and tire thickness; wider tires increase actual wheel diameter and corresponding speed. Color coding helps quickly identify different speed range gears. Gear ratio = chainring teeth ÷ cassette teeth, higher values mean faster speeds.