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

Custom RPM Input:  
Graph 2 Options

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
Top to Inputs

Malvern Star
VeloBase v.2.7.8 rev.5 - a Fischer Frameworks application, Copyright ¬© (2015) - All rights reserved.

Find the information on useful? Please consider donating a few dollars towards the web-hosting cost. Thank you.