Tubeless Valve Stem - Super Light Alloy - Pair - Choose Color/Size

I ordered the 44 mm version. The valve stem measured 44.8mm from the base of the stem, including rubber stopper, to the shoulder of threaded stem; not including valve core (see photo above). The overall length is slightly longer than what came off my 29" carbon Kappius rims and will work great on my trail bike. I wouldn't want it any longer. Each stem (package included 2) came with a presta valve core installed, screw nut, rubber o-ring on the stem that seats just below the screw nut and plastic valve cap. The screw nut has two flat spots and can be tightened with a 3/8", 9mm, open-ended adjustable wrench or by hand (recommended). The o-ring helps to secure the fit of the screw nut against the rim but is pretty small and won't protect the nut from rubbing on the rim (if that's something you're worried about). A single stem weighed 4g. on my kitchen scale without the plastic cap (see photo).The package arrived quickly and in good condition. This appears to be a great value. I'll update this review if I experience any issues with use.Install Tip: After tightening the nut to secure valve stem into the rim, place a small amount of rubber cement (included with many tire patch kits) around the base of the rubber stopper on the inside of rim -- over tape. Make sure you don't get any inside the valve stem (see photo). This will help to prevent leaks from the base of the stem and is still easy to remove should you need to fix a flat on the trail.

I'll admit I was hesitant to by these, but they work well. Seals tightly with no leaks. Whereas my stans valve stem failed during massive drops or when I bend the valve around with my hands, these work well, don't leak. and look good. Give them a shot.

The stems are as good as any from Stan's, American Classic, etc... but cheaper, and the support from VeloTubes is superb. I will not hesitate to order from them in the future-- and as I'm up to 5 sets of tubeless wheels now, likely sooner than later.

This valves a great and cheap too..get the job done and for the right price. Slap em in my ht added some sealant and ready to go..the runner o ring is a nice touch to prevent sealant/air from leaking...ordered another paired for my full sus..

Used these to convert my Salsa Cutthroat to tubeless. Maxxis Ikon tires, WTB ST i23 TCS 2.0 rims. Some guys will use a pair of pliers to tighten the stem bolt 1/4 turn past finger tight to ensure a good seal. The valve core is removable, which makes it easier to push a lot of air through them and seat a tubeless tire. You can also replace the core if it gets gummed up with sealant, without replacing the entire stem (handy).

I wanted to take one star away because of small rubber sealing on the wheel side. However, even with smaller rubber sealing, it works fine with no leak. So I rated 5 stars. The more rubber seal the better installation and sealing. I will buy this again if I don't fine any other valve with thicker rubber seals.

I bought these tubeless valves for my new carbon wheel set. The wheel box came without the provided valves for some reason. The valves I bought from Amazon are now installed and seems to be doing the job. My Continental tubeless tires are maintaining the pressure and that’s what’s important.

Installed on my Reynolds Strikes with 60mm rim depth. Seats in the rim and seals better than the stock DT Swiss valves that came with my bike. The DT Swiss valves have a tendency to move when going over bumpy surfaces causing leaks, these have stayed snug. Will definitely buy again.