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Valve head snapped off(6 posts)

Valve head snapped offIngeman
Apr 28, 2003 1:17 AM
10 miles into a 130 mile charity ride i got a snake bite. Replaced and pumped up new tube, and when removing the pump from the tube valve, the head of the valve snapped off. I repeated the process with another tube, and a few choice words of encouragement, and the same thing happend!
My possible theories are?
1. I pumped too vigourously, which i dont think is the answer as I am skinny chap, and support the valve by holding onto the rim when pumping.
2. I push the valve too deep into the pump, as when stripping the pump to get the valve head out, i noticed that the plastic casing beyond the round rubber head bit was gouged by the valve.
3. Any solutions please?

Thank you
re: Valve head snapped offcarbs
Apr 28, 2003 2:26 AM
I recently bought 10 tubes for $20 from Performance. Same thing. After the second one, I quit using them.
re: Valve head snapped offkoala
Apr 28, 2003 3:53 AM
Try spraying a little silicone into the presta attachment. Seems to help with tubes that have a tendency to do this.
Super light tubes.....byker
Apr 28, 2003 5:51 AM
do that if your not careful. I don't know if that's what your using but it could be the reason.
re: Valve head snapped offStewartK
Apr 28, 2003 8:22 AM
I had that problem last year when I bought some cheap tubes. Snapped three off in one day.

But I've never had that problem with Michelin tubes (they're reinforced at the stem). My advice would be to get better tubes and/or carry a Topeak Road Morph with you -- the flexible hose keeps the strain off the stem.
Long valved tubes by any chance?DINOSAUR
Apr 28, 2003 10:11 AM
I found I could not get over 90 psi using a frame pump for the long valve tubes needed for my Rolf wheels on my old bike without snapping off the valve stems. I snapped off two in one ride. My solution was to go to co2....