Review on Circuit Performance Black Bolt Valve by William Turner

Feels good, light weight. Looks great, sticking out about an inch, enough room not to scratch the rims. We'd really appreciate installation instructions, but if you don't have experience, call the pros! Installation instructions: Only use the stem with the first rubber grommet. Add another rubber grommet, facing each other. Insert washer. Tighten both nuts. Check out the photos for details.