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Tubular tire/valve stem questions(6 posts)

Tubular tire/valve stem questionshomegrown2004
Aug 10, 2003 11:31 AM
I recently got a pair of American Classic Carbon wheels and successfully installed the tubular tires. After getting the rear tire on it wouldn't hold air so I ripped it off and found that the valve was leaking. The tire held air prior while I was stretching and gluing it, so I assume something got messed up during the mounting process. I attempted to screw down the top of the valve (the piece with a small amount of threads) into the smooth part of the valve. In the process I managed to chew up the threads with pliers so now I can't get the valve extenders I must use to thread onto the valve. The leaky valve was fixed but now I can't pump up the tires, does anyone know of a product (valve/tool) that allows you to replace a presta valve core. It's a brand new tire and I would hate to toss it cause of this. Thanks for your input.
what brand/model tire? nmDougSloan
Aug 10, 2003 11:38 AM
what brand/model tire? nmhomegrown2004
Aug 10, 2003 12:53 PM
The tire is a Champion Criterium model.
I hope the Valve cores are removable...biknben
Aug 10, 2003 5:31 PM
Do you know if the valve core is removable? Some brands are, some are not. If it's not, you may be in trouble.

The little plastic core remover I have won't work if you've striped the threads. Just use a pair of pliers if you have to. You may need one pair of pliers to hold the valve stem and a second to unscrew the valve core.

Once you have the old core out you can put a new one in OR you could get the Vittoria valve extenders. I've found them to be far superior to other extenders. They don't screw over the core. You remove the core insert the extender, then put the core back on at the end of the extender. Even the stripped one would work.

The simple pipe extenders sometimes close the valve as you screw them on. This may be wahat happened in your case.
I need to use teflon plumber's tape.purplepaul
Aug 10, 2003 7:23 PM
Just a couple wraps around before screwing on the extender and the valve holds tight. Without it, leaks like crazy.
For future...No_sprint
Aug 11, 2003 6:55 AM
Loc-Tite the extender on before doing anything else.