They leak at the base no matter what you do. After spending hours and hours trying to fit these valves (where other valve types would do), I took time to actually review all these 5 stars reviews and realized they are almost all fake. These valves are garbage. Invest few more bucks and get Stans.

Includes a nice embedded o-ring in each nut so they never come loose. Helps with seal and prevent scratches, as well. A spare o-ring is included just in case and the valve core tool is a must have. Great size that fits almost any rim. This will be my go-to from now on!

Worked great

No surprises here. Great price. Valve core was easily removed. Feels good quality. Holds the air like its supposed to. Im happy.

Just what I was looking for and fast delivery.

Was easy to set up

I used a pair of i72 Tubeless 40mm Presta Valve Stems to convert my MTB to tubeless. The rims I converted were not tubeless ready & had schrader to presta valve hole adapters. These adapters are like “collars” that fit into the holes that are sized for schrader valves & have a split in them to allow for compression/expansion when installing. This split allows for a massive air leak. These valves, along w/2 layers of Stan’s rim tape & Stan’s NoTube sealant, successfully sealed & converted my MTB to a tubeless setup. The valves came w/their securing nut & o-rings. These tightened down & seated securely. The cores looked & functioned properly, no issue w/removal, installation, opening or closing. Both my pump & gauge also worked w/the valves properly. I have not had any issues w/them gumming up or sticking because of the sealant. Overall, I am very satisfied w/how these valves have been functioning. Thank you for taking the time to read my review, I hope you found it helpful.

Its been a month and holding good!

Good stuff

These mounted easily and had no leak issues at all.