klehner wrote:
Anachronism wrote:
klehner wrote:
Anachronism wrote:
I have had Vittoria latex tubes in my Flo 60’s, with velo plugs covered with two layers of electrical tape and gp 4000s tires all season. The first tube lasted several months with no issues until a cut sidewall. The second tube, spontaneously exploded about ten minutes after I installed it. The third tube lasted about a month and spontaneously exploded about two minutes after topping it off. Both tubes where completely shredded on the rim side for most of the way around.A shredded hole is formed when the tube expands without limit: it escaped from inside the tube and blew. No spontaneity involved. Sounds like the tube was pinched under the bead when installed.
Again - Pinched under the bead for a month with no issue then explodes without warning?
Again: a shredded hole indicates that the tube exited the tire/rim "container" and expanded until it blew. It's pretty clear from your description that is what occurred, and not due to a puncture. Why that exit occurred is not known, but the choices are pretty narrow: the tube slipped under the bead or the tube slipped through a hole in the tire. When you said "most of the way around," did you really mean that (like more than half of the circumference of the wheel)?
It seems reasonable that "topping it off" after it had been on a while was sufficient to cause a pinched tube to finally escape: the tire bead may have become a bit looser, and you finally got enough pressure in the tube to get it to expand and blow.
Yes, more than half the circumference of the wheel. It sounds like what you are saying is a minor installation error can result in a tube blowing out catastrophically any time even after 100's of miles. If that's the case then I'm going back to butyl.
I just realized I rode IM Lake placid on that tube including the 50 mph+ descent into keene :o
Murphy'sLaw wrote:
I'll take 'Cycling Superstitions and Myths' for $2,000, Alex.What is the myth here?
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Anachronism: Sep 10, 14 11:37