Gear Calculator
Gear Ratio Compare Tool
Tools
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Wheel Information
Wheel Size:
Custom: {Outer Circumference of tire in mm}  
Gears:
Custom:                   
Crank Information
Crank Arm Length:
Chain Rings:       
Graph 1 Options
Calculate:



Custom RPM Input:  
Graph 2 Options
Display:

  
Definitions
Gear RatioNumeric Ratio between the Gear Combination
Gain RatioThe Ratio of distance the end of the crank arm travels to the distance the wheel travels by taking into account the length of the crank arm. Proposed by Sheldon Brown.
Gear InchesCalculated by the Diameter of the Wheel times the Gear Ratio
RolloutDistance the wheel travels in one revolution of the crank arm. aka: Development
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DiaCompe
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