Chainring Size
30T 32T 33T 34T 35T 36T 37T 38T 39T 40T 41T 42T 43T 44T 45T 46T 47T 48T 49T 50T 51T 52T 53T

Cog Size
13T 14T 15T 16T 17T 18T 19T 20T 21T 22T
= | Calculate

There are several gear inch calculators on the internet, but most are either setup for geared bikes or only allow you to do one ring and cog size at a time. Since we're not in love with any of them we figured we'd design our own. If you're an ambidextrous skidder check the box on the left, and if you're looking for information on what each value actually means just click on any of the "i" boxes below. Select multiple rings and cog sizes for cross comparisons and don't forget to choose a tire size if you want an accurate calculation of gear inches.