Bicycle Gear Length Calculator. Sheldon brown on facebook. I have no idea how the magic number of 0 0796 was derived but the formula appears to provide a pretty good approximation to the shortest possible length of 1 2 inch pitch bicycle chain that will theoretically go around the two cogs on a fixed wheel bike.
3 is green 2 3 blue and below 2 red. Rabbit a singlespeed and fixed gear calculator john allen has pages giving exact fractional ratios calculated from gear tooth counts. Length of the chain stay.
Add mm if required.
Bicycle gear calculator free download bicycle spoke length calculator bicycle tire pressure calculator planetary gear calculator and many more programs. 0 20 mm 23 25 28 32 35 38 44 50 56 1 00 in. Add mm if required. Length of the chain stay.