Cannondaleriders

yeah...but i dont think tis enough to matter......but then again...maybe someone ahs tried it???
CHAD

I'd immagine the power band would be up there. Prolly similar to the mazda rotary engines..

someone with access to a scale needs to weigh their dale with air, then deflate the tires and weigh it with helium, that would be interesting

That would be perfect for like car tires oir soemthing....but the gains would be minimum for quad tires...cause they onlyholdabout 5-7PSI each.
CHAD
but it would stille neat to see the difference

Helium expands too much when heated. If you were to put it in passenger car tire, by the time you hit the freeway the tires would explode. I don't know how warm the air inside of a quad tire gets but I imagine the 5 - 7 psi would easily turn into 15 - 20 psi once they warmed up.