Mar 6, 2003 11:35 PM
|How much above the recommended max air pressure for a tire can you go? My Cont. Ultra 2000's say 120 psi, but I put in a little over 125--no problems, no flats. I just put on some Michelin Hi-Lite Prestige tires tonight (they were on sale at Performance), and they say a max of 116. I have these inflated to 125 as well. I haven't ridden on them yet, so I can't speak for how they'll do. By the way, the first time I'll ride 'em is this Saturday, my first race. I should probably deflate a bit to the max advertised psi, because I sure don't need a flat. I will be pissed.
Does anybody else overinflate? By how much? How do you think my new tires will hold up (they're much thinner than the Conti's)?
By the way, and I know this isn't new information to anyone, but I destroyed 3 tire levers, punctured a new tube, and actually broke a sweat trying to put those bastard Michelin's on. I was freakin' livid at how difficult the job was. I'd guess it took me close to an hour to do each tire. Freakin' nuts. Speakin' of, the itch is fading.
|Overinflation provides no benefit...||biknben|
Mar 7, 2003 5:21 AM
|Overinflation is going to produce a really harsh ride and be real sketchy while cornering. There's a reason the max pressure is printed on the tire. I wouldn't recommend going over it. I can't say I've seen a tire just blow off a rim but I'm sure it's happened.
When just training, I pump my tires to just below the max. I do that to avoid pinch flats. To be honest the tires feel best the next day when a little pressure has released. For racing days, I keep them 10psi below max.
If you have trouble with pinch flats at lower pressure you could go to a wider tire which would provide more cushion.
BTW: I've never tried Michelin tires but I've ridden with those who do. I've watched them scream and curse while trying to mount a tire. I've seen them break levers on the side of the road. People swear by them but I'm not willing to give them a try. Changing a tube should not have to be that hard.
|Overinflation can create a loud bang....||rogue_CT1|
Mar 7, 2003 10:32 AM
|Happened to me a few weeks ago. I was working on my bike and wheels after my wife and son were in bed. I mounted a Vitoria tire onto my wheel and began to pump. Like a fool I never checked the recommended tire pressure. I got up to around 140 psi before the sidewall and tube blew out in a loud explosion. Did I mention it was exactly midnight? Well, needless to say, I woke up my wife and son who both thought a gun had been shot off. Pretty dumb I have to say.
Never had a problem changing Michelins.
|Third-hand tire pressure safety report.||Silverback|
Mar 7, 2003 8:50 AM
|I can't attest to this personally, but when I lived in San Jose, my neighbor's brother worked for Specialized. He said the way they set max tire pressures is by inflating a sampling of them until they blow off the rims--then the max is set for half of that average.
I agree, BTW, that there's not much benefit to overinflation for the average rider. But there's certainly going to be a safety margin built into those things if you want to give it a try.