Originally Posted by
merlinextraligh
did you recalibrate your computer? the circumference of a 21mm tire is less than 28mm. So without recalibrating a traditional cyclocomputer will read too fast and too long with the smaller tires.
That would be really funny if that's what actually happened lol. Instead of switching to the right circumference, he should just to to KPH and pick up another 50% speed.