Your Campagnolo wheels likely have metal valve stems installed. This is a GOOD thing as the rubber ones age-harden & crack, just like old tires. Except that a bad valve stem can deflate the tire, usually at an highly inconvenient time (like at 150 mph....) FYI, the OEM stems in Europe were aluminum. And do NOT allow anyone to install clip-on balence weights on your magnesium wheels. These weights move slightly, crack the protective paint, water gets in there and rapidly corrodes the mag, and the wheel can crack at that point. Use ONLY glue-on balence weights. Keep in touch- thats our job!
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