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November 16, 2005

Metal valve stems or plastic ones

I have to admit, this was worrying me. 150mph with plastic stems stretching and twisting to the outside of the wheel. But, I think it's cool. Normal rims (Ford Explorer/Windstar), the valves stems stick out about 2 inches from the rim with no support. If you push them to the outside then you'll get a good 2cms of movement. The Porsche wheels surround a shorter stem with the rim. Pushing the stem outwards will give you around 1mm of movement. The rim supports the stem and limits it's movement when the wheel is rotating at high speed.

Steel valves are still better and if I had BBS rims etc then I'd have em but the stock wheels aren't so bad after all.

November 16, 2005 | Permalink

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