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

Couldnt get these to seal around the valves on my rims (Alex CXD4s) with Donnelley/Clement USH tires. Tried with o-ring both inside and outside. Wasted literally hours and hours on these valves. Should have just paid the extra 7 - 8 bucks for Stans as I finally gave up and switched to an old pair of stans valves and had immediately better results (still had some minor valve seal issues, but I didnt re-tape after using these stems and I suspect part of it is that these things blew the valve hole out too much).

The valves are absolute garbage.. Wish I could leave no stars at all. They leaked, tried everything under the sun to make it work but they’re useless.. I would not never buy it again..

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

The headline says it all.

Great worked as expected

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

Was easy to set up

I love the stems they are just what you need to go tubeless on your bike.

I installed these on 4 fat bike wheels. They are holding air just fine after adding sealant. Buying more for my gravel bikes. So far so good. If I have any issues I will for sure reply to my review.

Yes I will admit these things are a great deal. But with their low price they lack durability. I set them up with no problems but soon realized their weak points. If you do not fully tighten them to the rim they will leak a lot of air quickly. Overall if you are looking for a quick way to go tubeless these are a good options but if you are serious about cycling I would dish out an extra 10 dollars and go with a nicer pair