VeloTubes 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.

After this last season of riding I decided it was time to replace some parks on my Santa Cruz 5010c. I chose this blue valve stem for my mountain bike for looks and to be reliable. The valves were easy to install, had very clean threads and the selected color was nearly exactly how it looked online. Thus far they have been air tight and have had a few winter miles ridden with no issues at all.

Overall, the valve performs as it should. No complaints from a performance perspective. Knocked a star off as the colors are misleading. I purchased the red and it is a very faded red color, not really close to the images. Just consider the color on the image likely isn't what the actual valve will look like.

Awesome looking and very nice quality valves. The color options and valve length options are a must have. I have ordered 3 pairs already and I will be ordering more soon. Over all, I would most definitely recommend it to anyone who is looking to upgrade from inner tubes to tubeless tires, they work great on road bike and mountain bike wheels (sets).

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).

Been using these for around a month, no hiccups, only downside is they are painted not anodized. Do a scratch and the color is gonski. Too bad, but they rock as far as use and sturdiness.

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..

I have had zero issues with these valves. They are light weight. And you can get your favorite color. I can ask for no more. I am using the 44mm valves in 29" mountain bike wheels.