Bike Forums - View Single Post - Different cog numbers - speed difference?
Old 05-04-20, 09:44 AM
Tortoise Wins by a Hare!
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Originally Posted by burnthesheep View Post

Here you go. Put in your info, take a look. I like it better than the Sheldon page linked.
My critique of that calculator is it doesn't allow any fine tuning of tire size. For example, it calculates ALL 700c/29er tires as the same, no matter how wide (tall) they are. At the extremes, (700x23 and 29x 2.125) that difference likely equals a shift in cogs, or even more!

Probably my favorite gear calculator presently, especially since Sheldons calculator dropped the 700x28 tire option for some reason, (my favorite road tire size) is Mike Shermans. Lots of fine tuning, info, and cool graphs are available here:

Mike Sherman's Bicycle Gear Calculator
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