Quote Originally Posted by Veronica View Post

I think this needs a little research before being accepted as valid. Just ' cause the LBS guy says so, doesn't make it true.

Veronica
I agree. I have never noticed a CO2 filled tire needing to be re-filled more quickly. Perhaps it was not completely filled?



I must again post from Sheldon Brown's alter ego:


Quote Originally Posted by Carapace Completed Umber
CO2 is heavier than air, you will make your bike heavy and slow if you
use it. Helium is lighter, the only way to go if you want speed and
safety.

If you are willing to live dangerously, Hydrogen is lighter and cheaper
than Helium, but don't smoke while riding your bike if you use
Hydrogen...