Review on 🚲 MBP Alloy Tubeless 40mm Bicycle Presta Valve Stems: Fits Most Rims, 2 Types of Grommets Included! by Jeremy Keller

Very happy with performance, secure fit and durability. I've removed these stems a couple of times when changing band/maintenance and they reinstalled just like the first time and performed the same. Unfortunately I didn't take a picture of the top before I put the tire back on, but there is a thick, tapered, rounded rubber hub that fits the wheel and after a couple of remounts shows no wear. The same applies to the internal thread for the core. Thread/seal is ok. There is an o-ring behind the nut (you can see in the picture) that helps seal the side of the rim and the nut stays in place and hasn't come loose or loosened. (Always check these regardless of checking your tire psi). The nut is shaped like a small wrench depending on the finger grip. The finishing touches are the metal valve caps that come with the kit. I would definitely buy it again. Good price for what you get. UPDATE 11/12/20 I bought two more sets after my initial review and they all worked great.