Review on Circuit Performance Black Bolt Valve by Steve Snyder

One broke in half during installation. The other had a slow leak so I had to inflate the tire every 2-3 days before returning to the tire shop. They just replaced it with a cheap rubber and the problem was solved. These things are cheaply made and easily broken. I wouldn't do it again and I don't recommend it. You can lose air and get stuck in an apartment, which can be a major inconvenience. 2 valves are ok. Only use cheap rubber. They might not look that cool, but at least they will work.