GearInch app for iPhone and iPad

4.2 ( 6912 ratings )

Sports
Developer: Erik Hope

Free

Current version: 1.5, last update: 7 years ago
First release : 21 Dec 2011
App size: 788 Kb

GearInch is a bicycle gear inch calculator for your phone. Use it to find the cog and chainwheel sizes of your desired gear-inch ratio, or to figure out the gear-inch ratio of components you already have.

Features:

*Input exactly your wheel size! Support for 650c/700c/20", 24", 26" and 29"(same as 700c) wheel sizes.

*Precise calculations! Calculations include tire width.

*Mountain and road bike tires supported! Tire width input in both inches and mm for mountain and road bike tires.

*Convert in both directions! Input cog and chainwheel sizes to determine their ratio, or see equivalent combinations for an input ratio.