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postals tubs at 105...(2 posts)

postals tubs at 105...AD14
Jul 21, 2001 9:45 AM
The obvious question is why 105 and not more?
I'm sure you know what you meantKerry Irons
Jul 22, 2001 5:09 PM
but it may not be OBVIOUS to the rest of us. Are you saying that somewhere you read that the US Postal team pumps its tubular tires to 105 psi (7 bar)? If this is the case, I'm sure they are balancing traction and rolling resistance, maybe worried about pressuring up due to heat from braking, and since hardly any of them weigh over 150 lb, 105 psi should be enough. Michelin explicitly says that their racing clinchers should never be pumped over 115, and 95 is right for sketch traction situations. Lots of people think that pumping tires to 140-150 psi makes them "faster" but that really only works for TTs and track racing. Elsewhere you lose too much grip. Of course, if you were asking something completely different, my apologies.