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valve stem too short for ksyriums?(5 posts)

valve stem too short for ksyriums?Gav
Jun 26, 2001 6:22 PM
I purchased a ksyrium wheelset and a pair of Vittoria CX tubulars recently but found that filling them with air was difficult. The valve stem was not long enough according to my LBS and they suggested an adapter. This also does not work great, especially on the rear. I can't get them up to 140. Do I need tubulars with extra long valve stems? Does such a thing exist? Help.

Gav
re: valve stem too short for ksyriums?KStone
Jun 26, 2001 7:29 PM
There are many valve extenders out there and I've tried'em all. I found spinergy extenders to work best for me. I remove the 'inerds' though. A small amount of sealant on the extender threads will seal the connection and minimize air loss when filling. I use plumbers putty as it is non hardening.
I can't help on the tubular question because I ride clinchers. I am curious though, why tubulars...are they worth the hassle?
KStone
Get long stem prestas (60mm)Jay H
Jun 27, 2001 5:22 AM
Like KSstone says, there's no reason to use extenders on a main basis on your Kysriums. I have a set of Aerolights with the same exact profile as the Ks and I simply use 60mm stemmed presta tubes (which most tube manufacturers call "long stemmed" even though long stemmed doesn't mean it'll fit every rim (like a Zipp 404) but that is another thread. What I would do is buy Long Stem Prestas (60mm) and keep a valve extender (or two if you're the conservative type) in your bag, therefore there's no hassle to bother with extenders and if you run out of tubes and/or patches you can at least borrow a tube from somebody with a normal presta tube (hopefully with a removable core).

Jay
More: Get long stem prestas (60mm)Jay H
Jun 27, 2001 5:41 AM
..forgot to add to keep a little roll of teflon tape on the ride so you can tape the threads of the base tube if you decide to go the 60mm route and use the extender for emergencies.

Jay
Hello, Earth to Jay HKStone
Jun 27, 2001 11:59 AM
The original question is for tubular tires!!!...you can't put a tube, no matter how long/short the stem, inside a tubular tire!
Yes, teflon tape is a great suggestion. The spare tube I carry for clinchers has a long valve stem. If I have a flat I remove the tube with the extender and install the long valve tube, no need to carry teflon tape, etc.
Once home, I remove the long valve tube and replace it with a cheap tube with an extender. The long valve stem tube goes back in the seat bag. Doing this, I only ever need one long stem tube.
KStone