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Blown Tube Question???(5 posts)

Blown Tube Question???Ray G
Mar 20, 2003 5:37 AM
I just got back into road biking after a 10 year layoff. I bought a ultegra equipped Litespeed Capella, and so far have a dozen rides on the trainer, with only two road rides so far (MA weather!!!) This past Sunday I swapped out my rear Huthcinson Carbon Comp tire and tube for a Continental tube and GP 3000 tire. We did 20 miles with no issues, but when I returned from our 2.5 mile run, the tire was flat. I repaired it yesterday and the tube was blown out with a large tear around the valve stem. In the past, I have had puncture and pinch flats, but this tear was 4"-6".

Did I just do a poor job of mounting the tube/tire? Why would it blow out after the ride? Tire pressure was @120 and the wheels are Mavic Cosmos.

Thanks for you help...
re: Blown Tube Question???Scot_Gore
Mar 20, 2003 5:49 AM
My first thought is. you didn't do anything wrong, it's a defective tube.

My second thought is to check around the valve stem for sharp drill remnants around the valve stem hole.

Good Luck

Scot
Also, gentle with the valve stem. It can tear/weaken the tube.Spunout
Mar 20, 2003 6:22 AM
re: Blown Tube Question???Cabin
Mar 28, 2003 11:18 AM
I'm having trouble blowing out 27 X 1 1/8 tires on my trainer. I stopped today when a couple of large bulges appeared right on the tread ( not sidewall). It is obviously a heat problem. My old bike on the trainer uses Schroeder valve tubes.
Should I adjust roller pressure to be more ( to decrease slippage) or less ( to let it ride easier with less pressure on the tire)?
Should I inflate to high or low end of range?
Should I buy expensive light weight tires or cheap heavy ones and just plan on replacing more often?
Blown Tube AnswerKerry
Mar 20, 2003 5:11 PM
Any time you have a rip that big, it's pretty hard to envision a cause other than the tire coming off the rim. That suggests an install problem. Was the tire fully mounted when you found the flat? Even if it was, the tire could have separated from the rim, blown the tube, and then dropped back in the groove. How else could you get a tear that long (unless you tore it removing the tire)?