Stans-No Tubes 35mm Presta Universal Valve Stem (Carded Pair for Mountain)

I purchased these as I was having a big problem with my stem leaking air and figured these would be a great replacement. I installed them and still have a big problem with my stem leaking. I have since added a o-ring under the valve nut from an old tubeless setup and the seal around the valve seems better but I would recommend looking for a different valve if you want reliability.Update: the issue was not with this valve stem it was with my rim tape job. Once I retaped my wheel these stems work like a champ!

These valves were hard to find, once I knew where they were sold (here on Amazon) I bought them and they arrived very fast and, what can I say? they are legit, this brand is a very high-quality brand, their products are always high-quality, I own Stan's No Tubes ZTR CRESTS and I made them tubeless with this valves, I have been using this valve for pretty much a year maybe, they are just fine, very durable and very easy to install. If you want your rims tubeless these are the valves you should buy (IF THEY ARE COMPATIBLE WITH YOUR RIMS)(sorry for my English)

Usually I'm annoyed at how long the stems on tubes are, since my rims are pretty shallow. And these do work, both with my Control Tower pump and my Shiny Object CO2 inflator. But barely. Wow.

I put these on my Marin Rift Zone 2 and they work great. Make sure if you're converting from tubes to tubeless that the tape covering the hole where the valve goes has adequate coverage. I was worried when I installed these because it was leaking air, but after further investigation, it was the pre-installed rim tape that was the problem. I just added some Gorilla tape and now it's works perfect.

I was misled by the description on the Trek Store site where it said "everything you need for tubeless conversion" in the description of the rimstrips. So after receiving the package, I had no valve stems! So amazon.com to the rescue. These fit perfectly and they hold air with no problems. The removable core makes it simple to add more sealant.What more can you ask for? They aren't very blingy, but who cares? They're valve stems!

Bought these to convert my Diamondback Century 4 Carbon to tubeless. Picked up these, Stan's No Tubes Sealant, and Mavic Yksion Elite All Road tires. These worked flawlessly and after several weeks, the pressure in the tires are still the same as when I first filled them. I can't ask for anything better than that, so I don't see any reason to give these any less than 5 stars. They seem to be good quality, and they have gave me no problems.

I have one set of wheels set up tubeless with a set of valve stems I cut from some tubes - they have a removable core. These seem to be more solid on the base where they seal against the rim, You need to make certain you tighten them down enough that they don't leak. The core also needs to snug, but don't over tighten it. Some people have had issue with the cores breaking, but I haven't had any trouble with these, they work just as advertised. A removable valve stem is really only important if you're doing a tubeless setup, so you can add sealant without unseating the beads.

I like these Stan's valve stems. Less leakage than I've experience with some other brands that have an asymmetrical seal on the rim. Even if these spin because you tightened the valve too much, they retain their seal. I keep one in my pack just in case I run into a problem on the trail. Easy to misplace a stem when changing to a tube, so I like having a spare with me.

have several sets , no issues , they work .

Luft hält, mehr braucht man nicht.Längen beachten.

tres bonne valve attention il est important de savoir que des fois il y a des petites fuite d'air aux montage pour ma part j'imprime de léger petit mouvement de rotation a la valve et la pression dans le pneu fait le reste tous en resserrent la bague de la dite valve

3000 miles later, still holding air nice and tight. Yes there are cheaper alternatives but they all come in multipacks. Why is this you ask, because they may break so often and you have replacements. Why not just buy Stans and ride without fear. A perfect situation would include two spare valves in case of human/pump error.Still gets 5 stars because they haven't let me, or my tyres, down.

si estas buscando calidad y precio para tubelizar tus ruedas, para mi es la mejor opcion. ya que por ahora van perfectas y su forma cónica hace que la salida de la válvula quede estanca. por ahora muy contento veremos como llevan el desgaste y el paso del tiempo.