Originally Posted by
queerpunk
FYI you are using accurate but non-standard calculation to come up with your gear inches. Most people do 27 * chainring/cog. You're using 26.X, which is the true diameter of the wheel. But most people use 27 as the multiplier, and call a 51x15 a 91.8" gear, a 48/14 a 92.5, etc.
I think low 90s is the right zone for a Cat 3. 51-15 or 48-14.
Cool, thanks! btw, I am getting my calculations from the the BikeGear app. I'm plugging in the chainring and cog sizes, crank length of 165, and tire size of 700x20.
iTunes:
https://itunes.apple.com/us/app/bike...936361951?mt=8
Android: ???
Know of an app that uses the calculation that you reference above?