Originally Posted by
Dan Burkhart
Here is my go to gear inch calculator.
HTML5 Gear Calculator
It lets you chose between single speed, cassette or popular IGHs. In KPH, it will show meters development, for gear inches, switch to mph.
It also allows you to chose your tire size for greater accuracy.
That's pretty nice. After playing with it a bit, I see I can enter the rollout distance rather than use the tire size drop down, which would help account for my 23mm road tubulars having a different diameter than my 23mm track tubulars.