Originally Posted by
ColonelSanders
Why don't people use a tailor's tape to measure their wheel's circumference?
Also, do people reset their computer's after a while to take into account the tyre losing tread?
Maybe people do, but it would seem very awkward and not necessarily accurate, given the difficulty of keeping the tape on the center of the tire and the inability to put any weight on the wheel, as one can on a rollout.
...and folks, again remember we're generally talking about 1/2% difference. Instead of obsessing about how far you're riding, how's about just get out and ride.