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Tire Pressure on Deep Rim Wheels(9 posts)

Tire Pressure on Deep Rim WheelsJoel_T
May 26, 2002 6:22 PM
Hi,

I'm using the HED Deep & Jet2000 wheels. I'm encountering the following problem: when inflating the tire (using the valve extenders for the Deep & the Jet2000) , the pump gauge shows 0 pressure all the time, although the tire is being inflated ( I can feel it , and there's no puncutre in there - the air stays in for days). Please note I've checked the pump with regular tires (w/o valve extenderes) & it works great.

I'd be happy to know of any recommendations how to overcome this problem.

Thanks,
Joel.
re: Tire Pressure on Deep Rim Wheelsda cyclist
May 26, 2002 8:08 PM
Did you wrap the threads of the valve with teflon tape before you put on the valve extension so no air would leak out?
re: Tire Pressure on Deep Rim WheelsJoel_T
May 27, 2002 8:00 AM
Hi,
I didn't touch the valve itself. I don't sure I understand what you meant. If air does leak, its because the valve extension isn't air tight (I guess).
Joel.
re: Tire Pressure on Deep Rim Wheelsda cyclist
May 27, 2002 9:57 AM
Basically, the connection b/w the valve extender and the valve on the tube is not airtight. What happens is that when you pump in air, some goes in, but the rest leaks out and the gauge on the pump goes back down to zero. You need to take some white plumbers tape and wrap it around the valve on the tube where the valve extension screws on. That should stop the air from leaking out.
re: Tire Pressure on Deep Rim WheelsJoel_T
May 28, 2002 5:32 PM
Hi,
I tried it, but it doesn't work (even with a considerable wrapping of the valve). After screwing the extender & pumping - the gauge still shows 0.
re: Deep Rim WheelsChen2
May 26, 2002 8:27 PM
Why don't you just use tubes with long valve stems. They are available in several different lengths. I use 60mm stem tubes, my LBS has them all the way to 80mm.
re: Deep Rim WheelsJoel_T
May 27, 2002 7:58 AM
Hi,
The Jet Deep has a 90mm rim. I don't know of any valve this long.
Joel.
re: Deep Rim WheelsChen2
May 28, 2002 3:17 PM
Sorry, didn't realize they're that deep. I haven't heard of any stems that long.
re: Tire Pressure on Deep Rim WheelsJimP
May 29, 2002 8:55 AM
There are different types of valvestem extenders. I bought a pair from Tri-Zone that move the valve out to the end of the extender. This solved the problem for me.

http://www.tri-zone.com/Catalog/BigTNIExtender.html