Color Silver Brand Continental Number of Pieces 2 Shape Round 2 Pack Screws into tubular tires Screws into inner tubes with replaceable valve core Presta valve
$14.95
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Valve Extender – 20Mm / 2Pk
Phone: +13023021699
Email: [email protected]
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Originally, I just tried screwing one of these puppies over the presta valve of a tire on an aero wheel, but that didn’t work well at all. Prepared to award this seemingly miserable product a single star and a nasty review, I happened to glance at the DIRECTIONS, and realized the valve was to be disassembled BEFORE attaching the extender, and that the black plastic piece in the packaging was a wrench intended to accomplish this very purpose, and not, as I initially perceived, a roach clip misplaced by a Continental or Amazon employee. This is a great product that works wonderfully, even if the wrench looks like a piece of drug paraphernalia.
PC Mountain (verified owner) –
In addition to this extender I tried Bontrager and Origin 8 extenders and the Conti one is the best. It comes in lots of sizes, they don’t rattle, they are easy to use, solid and inexpensive. I just wish they came in black. End your search and just buy this.
joe-rktek (verified owner) –
First off I want to point out that these didn’t work for me as I thought they would have. I was setting up 50mm carbon rims, tubeless, forgetting the fact that I need the stems to be fastened to the wheel. These are not threaded to receive a holding nut and can easily be pushed into the rim causing air leakage. However, as a product these are a much better option than using extenders that screw over the presta core, where it is hard to check pressure with a standard gauge and needing to stick a piece of wire or spoke down the shaft the release air. The presta core screws right in to the stem allowing to easily achieve the a fore mentioned tasks. Definitely use a little Teflon tape on the threads before screwing into valve stem.
David J. Sandstrom Sr. (verified owner) –
This work great with deep dish carbon rims. The ridges on the tip also allow a good grip when your filling up with your presta valve pump. Make sure to put on pipe sealant teflon tape before screwing these on for a better seal. This is the 3rd set I’ve bought. Also make sure to get the proper length so that you have room to place the pump on your valves stems. I tend to go with a little longer valve extender because I have a 60, an 88 and 100mm different deep rims.
William Jenks (verified owner) –
Don’t waste your money and give yourself aggravation using any valve extenders that dn’t have this feature of actually moving the valve. The ones that just screw on to the end of your valve and rely on pressure to open the valve are a royal pain in the butt compared to these guys. Never had a failure with this brand or its harder to fine equivalent from Zipp. Multiple failures with other extenders that close the valve or don’t seal wells etc. Get these and give yourself some peace of mind. (You’ll need to buy tubes with a removable valve core, which cost a couple bucks more…but you’re riding Zipps or some other expensive wheel if you need these, so quit complaining about a couple bucks for a decent tube!). 🙂
SciFiFan (verified owner) –
Easy to install but that’s where the good part ends. The valve reciever end is thick and threaded and makes it difficult to clamp on many pumps. Gets clogged up easily with anti-puncture fluid, which makes changing tubes difficult because you can’t deflate them all the way.
hardfitbod (verified owner) –
It would have been better to buy the right size for my tubeless stem, but my LBS only had 44mm’s. I had enough bite for a shallow air chuck, but it would be too short using others an unfortunate oversight when I went on a trip. These stem extenders are just the right length without looking stupid and work better than the extenders where the valve does not need to be removed. I did use plumbers tape to make sure I had a good seal and had to re seat the tires in order for me to inflate them after installation so if you are planning on using them make sure you have a compressor or good pump or you will need to take a trip to your LBS.
David J. (verified owner) –
This is a terrific product. My wheels have deep rims, and the tube for my front wheel only comes with a 40mm valve stem, which makes it difficult to get a good seal with the pump. I bought the 20mm valve extender and installed it with no problem in about 10 minutes. As suggested in several Youtube videos, I used a little bit of Teflon plumber’s tape on the threads to ensure a good seal. Now, the pump engages with no problem, and the valve does NOT leak at all. I should have done this a long time ago.
epbob (verified owner) –
As long as you remember that these work only on tubes with removable cores, these are great. Try them out at home before you ride. Simply remove the valve core, screw these in, and put the valve core in the extender. Voila! They are well made and come with the mini, plastic valve core wrench. If you find a good deal on tubes with short stems with removable cores, these might come in handy, or if you have deep aero wheels that require an extension, these can help. Better to buy the right length stem to begin with.
Galen Helgemo (verified owner) –
I am sure you, like me, are thinking… do I really need this?I am also sure you, like me, learned that there’s a specification on a tire tube that tells you the length of the presta stem. So I regret to inform you… yes it’s necessary if you, like me, bought tubes with too short of stems and realize it is not worth shipping the tubes back.Super easy to install. I had the Park Tool VC-1 tool but the included little wrench works fine. I used the included wrench to install the main cylinder. All hand tight and haven’t noticed any leakage.I am almost certain I can use them on the spare tube when the time comes (since I have 3 tubes but only two extenders).