Originally Posted by
AngryScientist
the ratio you're after is 34x16, which is 55.8 gear inches. if you had a 36t inner cog: 36x17 = 55.7 gear inches, which is essentially the same. compact chainrings are cheap, and easily changed, this would be a good, easy gearing experiment for you.
he really doesn't even have a problem. he's already got a 54.8 GI. (50x24)
in fact the 54.8 is calculated assuming a 23mm tire. if he's got a 28mm tire it IS 55.8. maybe i'm missing something. if so, somebody please tell me!