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Blowouts and overinflation(13 posts)

Blowouts and overinflationdaniell
Aug 19, 2003 2:00 PM
Today I was riding my moutain bike on road. I have cheap Performance tires intended for city riding. they were rated for a maximun of 60 pounds of pressure. I pumped them up to 70. The rear one blew on me. I was able to boot it and get home. I was under the impression that one could exceed the maximum.
El Cheapofiltersweep
Aug 19, 2003 2:21 PM
I'm guessing on a mtn bike the sheer volume of the additional air could be a problem... and those tires are usually so easy on/easy off no tire levers (or effort) is even needed). I'm not terribly surprised.
Wow shockinglotterypick
Aug 19, 2003 2:28 PM
You ignored the instructions and it didn't work.

Who's fault is the failure, Performance's?

Hope this philosophy doesn't carry over to home appliances, your car and other potentially dangerous user responsible applications.

Don't use the blow dryer, while in your tub (despite what other's may suggest) the instructions say it's bad for you.
Tires are commonly overinflatedSprint-Nick
Aug 19, 2003 8:28 PM
The point is a tire should be almost 100% guaranteed not to blow out at its given pressure. 15% above it shouldn't make a difference and could lead me to believe its a deffective tire. If it had been inflated so you feel would never have blown or it would have taken a lot longer?

Hmmm...
Should be OK, but they DID warn you...Silverback
Aug 19, 2003 2:28 PM
I've had good luck with most Performance tires over the years--I've run them on my commuter and my kids' bikes, and occasionally bought them on sale for my "real" bike. They ARE fairly cheap, though, and a bad one probably slips through occasionally. I've had name-brand tires blow or peel without apparent cause, too. I'd be sort of surprised if that fairly small degree of overinflation was to blame, but they have to set a limit someplace.
re: Blowouts and overinflationjrm
Aug 19, 2003 3:15 PM
lack of rium tape will cause a tire to blow if the tire is inflated more than the max.
I thinkspluti
Aug 19, 2003 3:50 PM
you pinched your tube. I have never seen a pressure gauge that I would rely on for +- 10 lbs. Your tires should handle %150 of there rating.
I thinkdaniell
Aug 19, 2003 3:59 PM
I doubt that I had a pinched tube, since I had installed the tube many miles ago. Two factors come to mind. I have Mr. Tuffy in the tires, and the warm weather.
I am almost ashamed to say, that I paid $5 per tire on sale. They are kevlar belted.
Blowout or blowoff?Kerry Irons
Aug 19, 2003 5:03 PM
If you had a blowout, then you have a hole in your tire where the tube came through. If you had a blowoff, then there is a high likelihood that you didn't have the tire installed properly. Sometimes you can ride on a tire like this for quite a few miles and then hitting a rock or pavement edge pushes it off the rim. Typically there is a raised ridge on the sidewall of the tire, and it should be equidistant from the rim all the way around. Also, before pumping up a tire, be sure to pinch the bead all the way around a couple of times to make sure that the tube is out from under the bead. When I switched from tubulars to high pressure clinchers, I had a tire blow off after several miles of riding, and I wasn't riding the bike at the time. I'm sure it was my fault, as I remounted the tire and never had a problem with it again.
Blowout or blowoff?daniell
Aug 19, 2003 5:30 PM
It was definitely a blowout. I have a big hole in the tire. The tire stayed on the rim, and the bead was in place
Well then...biknben
Aug 20, 2003 6:10 AM
Overinflating a cheap a$$ tire is a recipe for disaster. You might be able to get away with it on a higher quality model but not these.

Don't go higher than the max. pressure. That's why they call it MAXIMUM.

It's not uncommon to get a small slice in the sidewall of a MTB tire. If it's big enough or YOU OVERINFLATE the tire, the tube may stick out and hit the brake and blow. This may have happened to you. You'll never know but I bet the pressure had something to do with it.
How do your brakes line up with your rim?Spoke Wrench
Aug 20, 2003 8:20 AM
If your brake pad touches your tire even a little, it'll wear through your tire and cause it to blow out in no time at all.
Hot Weatherdaniell
Aug 20, 2003 11:15 AM
I am still wondering whether hot weather played a role in the blowout. Perhaps I should inflate to a lower pressure in the summer.