Set of 4 Black Bolt-in Flush Mount Valve Stems by Circuit Performance Review

What the hell! The filling stem does not screw into the valve. hats are on! But no, not a filler rod. And there should be 4 filling stems, one for each valve. I'm sitting here at a professional tire manufacturer and my tires are deflated because they can't fit a stem into a valve!

Firstly the threads on the stems of this valve suck, the inflation valve doesn't screw all the way in so the valves will still work but why would they have an o-ring? If they don't screw everything on like there should be a second then the caps won't screw all the way down due to bad threads and the o-ring will not seal as a result allowing water and dirt to enter the valve, not good, not sure whether I have a bad batch. or what, but it's garbage

I am a professional tire fitter, not only cars. From high-quality Mercedes tires to industrial tires for forklifts, everything goes through my hands. I've seen and used about 80 different valve stems over the years. The material they are made of is soft and prone to improper installation. I would recommend fitting them yourself because if an indifferent tire specialist fitted them to a large tire chain he could damage them if he isn't careful. I love the way they look and all my colleagues are…