These are lightweight and just long enough to use in the 57mm deep carbon wheels I just bought, when running the Vittoria latex tubes (which seem to come with only one length of stem). The Zipp factory extenders are too long for this tube unless you prefer having 3 of extra valve stem whipping around on your wheel. Just remember to use Teflon tape on the threads and avoid getting the tape on the actual valve seat. I also used a 1 12 piece of electrical thermoplastic shrink sleeve over the threaded joint to keep the extender from loosening and from rattling inside the valve stem hole in the wheel. A little better than using electrical tape to fill the gap.
I have always used, with grand success, Tufo valve extenders on my tubular carbon wheels.
How to use Remove Presta valve core from your new tire with a Tufo valve core remover, next
be sure to use some thin white plumber's tape to wrap around valve extender's threads (forming an air-tight seal). Also, place some plumber's tape on the valve core you removed, then screw it into the valve extender,
then screw extender into the wheel. DONE. Yes, the extender fits between tire valve and valve core.
Fill tire, you're ready to ride.
Simply put,I have used these same extenders on my Pinarello now for 5 years straight on Continental and Tufo tubulars, without failure, tire after tire. If you are seeking an easy-to-use, no non-sense extender give these a try, I highly recommend them. Oh yeah, they're light, very light weight.
This is the only way to go for valve extenders. Don't get those old ones that fit over the existing and leak unless you get a perfect seal. I use these and never fight leaks...and don't forget an extra to have installed on your spare, especially for races
I use high profile carbon wheels made by Lightweight, thus I don't want junk to go on the wheel as part of its' assembley. My choice by far, bar none, is the Tufo Extender. If it's good enough for my Standard Lightweight, it's good enough for whatever your needds are! Assembley is easy, but I would advise on buying one of the little plastic valve tools,e.g., around $2.00ea. You will also want to buy some thread tape, it's cheap and one roll will last for years and years of use. Go for it!