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Should I let out some air?(7 posts)

Should I let out some air?t0adman
Jul 3, 2003 6:32 AM
I run my tires at about 125psi and I'm headed up to Whistler this weekend. Should I let out some air before I make the ascent?
Jul 3, 2003 6:37 AM
Unless you weigh more than 250 lbs, pumping your tires up to the maximum pressure will do nothing for you other than give you carpal tunnel in the hands.
I find different tires feel best at different pressures.dzrider
Jul 3, 2003 12:22 PM
Some right up to the max (Vredestein) most somewhat lower.
is this a hill climb?DougSloan
Jul 3, 2003 6:45 AM
If this is a pure hill climb (I have no idea), then I'd say keep them rock hard. I feel much more efficient climbing, especially standing, with hard tires. Now, this will compromise comfort, cornering, and braking, but those aren't important in a climb.

If this isn't a hill climb, then nevermind. I'd just do what you always do. Nothing wrong with 110-120 psi, though.

nope, just driving up there...t0adman
Jul 3, 2003 6:58 AM
I weigh about 215 right now, and I've always run them a little higher psi. Is there no real decrease in rolling resistance with higher psi?

Also, since I'm just driving up to Whistler, should I deflate the tires? Does the altitude change make a difference?
keep it where it isDougSloan
Jul 3, 2003 7:06 AM
If you weigh 215, I'd keep those babies pumped.

The altitude difference won't matter at all. Atmospheric pressure is about 15 psi, so your tires already are about 8 times atmosphere pressure. If if you went to outer space, the relative pressure would only increase 15 psi to 140. If you can still breathe, the tires won't know the difference.

Yep, I'm big....but not for long! ...thanks ....nmt0adman
Jul 3, 2003 8:42 AM