Originally Posted by mrvrsick

PS

Get yourself a cyclocomputer and find a way to mount it (those *shafters* are gonna be in the way) and dial it in to your TRUE circumference. That means pump your tires up to 100 psi or whatever you run, *get on* have a buddy help you roll the bike/keep steady, and measure the distance your front wheel goes with one revolution. And check out mapmyride.com