The metal stems will solve a problem that occurs if you purchase certain in-TV tire pressure monitors. Rocky Mountain Ray reported that at least some monitors include a sensor that mounts to the valve stem. This extra weight causes the stem to flex under centrifugal force that comes from increasing tire speed. The flexing could certainly be expected to induce wear and possibly failure of the stems. If you're thinking of ordering this type monitor, as we are, metal stems seem like a great idea. Thanks, Ray, for passing this on.
(I'm not sure exactly where his discussion resides. Try a search under Tires, Tires, Tires.)
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