i72 Tubeless Valve Stems 40mm Presta Pair - Brass Made with Core Remover Tool, Round Rubber Base with O-Ring for Better Sealing

Followed BASIC instructions and both leaked air. Did not form a tight seal.

Perfect fit for going tubeless

I thought I would save money and purchase a set of these for my Stans ZTR crest rims. I couldnt get these to seal properly without air leaking at the stem. I tried both valves that came in the package and had the same results.

Works great, great price

Best Tubless valve stems at a Great price. The 40 mm length is perfect. Much better than the standard length. The Buyer gets you the items super fast as well.

Quality was good and conveniently came with the core tool. My only problem was that the valve stems wouldnt seat completely when installed (WTB i19 wheels) as they were slightly too wide and the rubber too hard make an airtight seal, even when the nut was tightened with pliers.

Love the rubber o-ring that keeps the tool on where you need it! These worked great for my tubeless tire conversion

Ive gone through a lot of valve stems in my time using tubeless tires. These are by far the best-built Ive seen - a bit more substantial than other brands Ive used. They also have removable cores, which is huge for those of us adding sealant without wanting to pop the tire bead off. Im going to see if they have a 60mm length version for use with more aero-style rims.

Used 1 in gorilla tape on rim. 3 oz of stans and these. Worked like a charm.

I have a standard rim and the rubber part was slightly too big to fit in the hole. I ended up tightening the nut really tight and it still seals so it isnt a huge deal. The stems seem solid and durable. Pretty happy with this product. Only knocked a star off because of the fit.