The valve stem itself appears to be a well made piece with a nice chrome finish but the rubber bushings are cheap rubber. I've had them on my 99 Ram 2500 wheels for about 3 months and the bushings have already cracked from dry rot. They don't hold a seal. My tires have lost 20psi in 3 months. Even with the traditional valve stems I previously had on my bikes, my tires didn't lose air pressure as quickly. I will have new tires soon and I will buy Milton high pressure bars when I change them. I would recommend others to do the same.
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