Originally Posted by
dvs cycles
It would only be dead on if we were using solid tires that don't deform and you measure with the bike exactly upright.
Roll out is the only way to go. I find the charts to be too high of a number. If you want to read faster speeds than you are actually riding use those.
If you sit on the bike and have someone measure that's accurate enough for me. Hell, even without someone sitting on it. I'm happy if I know I went around 100kms on a ride. I don't need to know I went 101.3kms.