Ultimate Bicycle Gear Calculator

The best bicycling gear calculator on the internet.

Inspired by and updated from Sheldon Brown's Derailer Gear/Internal-Gear Calculator´╗┐

Contact us (below) if you have a cassette or tire size you would like to add, or found an issue.

Dupe
Ring 1Ring 2
Cogs
112.6580.81
102.4173.46
93.8767.34
86.6562.16
80.4657.72
75.1053.87
66.2647.54
59.2942.53
53.6438.48
46.9433.67
40.2328.86
34.1424.49
© Westchester Cycle Club 2023