Originally Posted by snowhawk jockey
The aerodynamics are always my excuse for why the back tire just spins up(on dirt) and the bike doesn't gain KPH on the speedo, above the "terminal velocity" of our coefficient of drag.
That's a fun feeling. When you just hit that wall where the tire spins up.
Also at those speeds that's a reasonable ammount of speedometer error. So 218 indicated is not 218 actual.