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gearing on track and road, can you mathmaticly relate them ?(2 posts)

gearing on track and road, can you mathmaticly relate them ?ishmael
Jul 21, 2001 5:11 PM
im getting a track bike soon which im going to commute on... i want to spin the whole time and im sure the cog it comes with is going to be too small...so im going to get another but track cogs are expensive and i dont want to get the wrong one...can i deduce while on my road bike what cog i want to buy for the track bike..the road has standard 53 and 49 rings and the smallest im getting for the track is a 46...is there a formula
re: gearing on track and road, can you mathmaticly relate them ?supercorsa
Jul 21, 2001 7:32 PM
howdy,

the formula for figuring traditional gear inches is as follows. divide the chainring tooth count by the cog tooth count, then multiply by 27. a setup of 65 gear inches is pretty much ideal for spin training on a track bike. my track bike came with a 48x15, it was actually cheaper to keep the 15t track cog in place and change the chainring to a 36t.

good luck, eric