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

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.

Exactly as expected, the core removal tool is perfect and a nice plus

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

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.

Good for the price

Very nice quality and reasonably priced .. worked perfect for my tubeless tire conversion !! .. will definitely buy again for the next set

Worked great with Stans tape on a road bike rim. No issues - sealed on the first try.

Arrived promptly with no surprises. What more could a customer ask for?

Each valve stem came with a small rubber o-ring, but there was an extra larger o-ring, and didnt know what it was for. I had problems with air leaking from the valve stem. I know not to over tighten the stem when installing, and made sure it was properly seeded.

Bought these for my Giant Trance 2 with stock wheel set. They fit perfect. Round base so no worrying if the stems are still aligned after installing the tire.