Continental Conti Valve Extender (Pack of 2)

Excellent quality. You have to unscrew the presta value off the tube then attach the valve extender. Just as easy to pump up the tires as it is with the regular presta valves. I accidentally ordered a size too big for the depth of my wheels but even so, the extenders still look great on the bike.

Fit good

If you need valve extenders, these are the ones to get. Note that they do require removing the valve core, so be sure that your tires/tubes are compatible.

I have a Dahon folder which came with deep rims and tubes with long, long valve stems. When I wanted to add sealer against thorns, I could not find tubes with removable presta valve cores that had a stem long enough to fit the rims. Their valves just barely peeked out from the rim with not enough room for a presta pump to fit. So I used these extenders to solve the problem. Now I can add sealer. These can be transferred to new tubes if necessary. Perfect solution. ***FOLLOWUP SEPT 10, 2016 *** SUBTRACTING TWO STARS FOR DELICATE CONSTRUCTION I had trouble with one of these extenders and had to order another set. The seal on the end (the white ring in the photo) broke off in one extender. The sealer I added had jammed this end and I could not add air to top off the pressure. I unscrewed the valve core from the outer end of the extender and pushed a wire down the tube to clear the lump of sealer. It held air OK that time. But the second time I topped off the pressure, the same thing happened and it would not take air. This time I unscrewed the entire extender, but the end with the white sealing washer was damaged, probably from the time I had unclogged the tube before. The end with the white washer broke off entirely, so the tube would no longer hold air even when I tried teflon plumber tape to the threads. THE END WITH THE WHITE WASHER SEAL IS EXTREMELY DELICATE AND WILL BREAK EASILY. I had to reorder a second set because once the sealer washer is broken it will NOT hold air. Perhaps it would if you were to glue this section to the original valve stem with something like Gorilla Glue, but then you could not remove the tube when replacing it (the extender is larger diameter than the rim hole). I would much rather these extenders be made from a more durable metal, brass or steel. So I took off two stars for how delicate these are and how vulnerable the essential seal is to breakage. The wall thickness of the sealing end is too thin for the alloy it is made from. Note the sealing washer fits over a reduced diameter tube at this crucial point. Otherwise these work well.

Very good and light. I remove a start because I find annoying that they force us to buy 2 when many people have a disc in the back and 808 in the front e.g.

These things are super long. I wish they were black to match my theme but they go on without a hitch. nice little tool in the pack to tighten the stem and screw/unscrew the presta stem. ZERO leaks. Awesome stuff. dont hesitate to buy these if you have a set of deep V wheels.

I just return valves. because it doesnt fit for Michelin AirComp Latex Tubes. however this extenders are high-qulity

The best extenders. None others worth buying.

Exactly what was needed for the deeper Zipp rims. Removable valve core tubes and these extenders make everything so much easier. I wish you could buy different lengths in a set, but this was a huge improvement. 48mm valves on the tubes and 60mm extensions fit the 808 rear wheel well but are long on the 404 front wheel.

Does its job well. It fits perfectly and holds air.