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Bang, bang, they shot me down...(4 posts)

Bang, bang, they shot me down...jagiger
Aug 21, 2001 5:44 PM
I decided to replace a leaky tube with a new one & keeped the patched tube as a spare. I thought that this should be easy to do....I did it as a kid, although the tubes were much thicker. Any way, I take the old tube out, put the new one in, put the tire in place, push back the tire bead to be sure the tube fits correctly all the way round. Ok, add about 25-30psi of air. Recheck tire & tube situation. Ok, fill to 110psi and here's where the funs starts. With just the effort it takes to push the tire into the chain stay...the tire blows big time!!! in a cloud of smoke. It startled the heck out of me.

I thought that I did everything pretty well & call lbs, thinking this might be defect. They say that it happens to them as well & they reccommend baby powder to ease things along. Anyone have anything similar or thoughts on how to avoid this again (for myself & others)
That was a Specialize tube by the way. thanks
re: Bang, bang, they shot me down...peloton
Aug 21, 2001 5:58 PM
Check the bead all the way along the rim before you inflate the tire to make sure that the tube isn't stuck under the bead. Anywhere that the tube is stuck under the bead, you will need to gently push it out into the tire. Give the rim valve a couple of pushes before inflation too, this can help to free any part of the tube trapped there as well. Talcum powder will help to lube things a little too so that this job goes more easily. That gunshot like blast you heard is pretty common when the tube is trapped under the bead and the tire is inflated. Happens a lot.
re: Bang, bang, they shot me down...Proboscis
Aug 21, 2001 6:23 PM
A small portion of your tube was cought between the bead and the rim. Makes a heck of a noise. Sounds much like a large caliber pistol shot. Talcom(sp?) powder helps alot, also slow inflation at the beginning to check the bead before getting to 110psi and above.
re: Bang, bang, they shot me down...Miklos
Aug 22, 2001 5:48 AM
One thing that might help is to slightly inflate the tube to about the size of your pinky finger or till it gets to a rounded shape instead of flat. This will help keep the tube from being pinched by your tire levers (if you have to use any) and keeps the tube from getting between the tire & the rim as mentioned above.