Buy Cheap Topeak Presta Valve Extender XL with Valve 
Buy Low Price From Here Now Machined aircraft aluminum Presta Valve extender with rubber seal. Fits deep dish and carbon rims 60-90mm.
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- Topeak Presta Valve Extender XL 78mm Black
- Machined aircraft aluminum Presta Valve extender with rubber seal.
- Fits deep dish and carbon rims 60-90mm.
See more technical details
"Best overall solution presta valve extender" 2007-02-18
By Ignacio Bustamante (Miami, FL USA)
Only need one extender to inflate many tires. With this Topeak presta valve extender, you do not need to leave in place the extender once it is installed, since this extender features a plunger that is used to tighten/untighten the the knurled nut on the existing presta valve.
Procedure I use: Screw the extender onto existing valve, push the plunger down to engage the valve nut, losen the nut and proceed to inflate. Once the tire is properly inflated, tighten the nut, disengage the plunger by pulling it up few milimeters, and remove the extender by unscrewing it. Repeat as necessary on as many tires as you wish.
If needed for competition conditions, you may use two extenders and leaving them in place on each tire for fast access. There is no need to use teflon tape with these extenders, since you are using the existing valve nut to close it down.
The only drawback with this product is, that you may not be able to tighten the presta valve's knurled nut real hard as you may have been accustomed to, and could become lose with road vibrations, thus leaking some air. This has not happened to me since the three months I have been using this valve extender.
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