I should have read all the reviews. Like several other reviewers, after setting up my new tires and wheels, and installing sealant, these valves leak at the drilled rim hole. They dont seal properly. Big mess to re-install my tubeless tires with old Stans valves which fixed the problem. Mistake to buy these to save a few bucks. Stick with name brand components. Not at all sure about all the positive reviews on Amazon. Read and believe the negative reviews!

Exactly what I needed.

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.

Was as described and shipped fast

Just got these and threw them on with my new plus size maxxis minions on i35 rims and they fit great, feel super durable, and seal perfectly. 10/10

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.

Was getting a leak around the valve stem on a mountain bike. After put this in it fixed the issue. Great product. Need to sell it with larger quantity.

Its been a month and holding good!

Perfect fit for going tubeless

Worked great. Making wheels tubeless isnt for the faint of heart, but these stems worked great.