26inch 100mm vs 29inch 150

General
11

Gain ratios

[Diameter in inches] x 12.7 = [Radius in mm]

So

(26 x 12.7)/100 = 3.30
(29 x 12.7)/150 = 2.46

Here are a bunch more pre-calculated:

That said, speed is much more than the raw gearing. Being able to put those shorter cranks to affect depends largely on you. For me though, the 26" setup would be faster.

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