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Registered
Join Date: Apr 2002
Location: Santa Clara, CA
Posts: 5,668
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My Carrera used to do this. I think it was tire rubber, but I wasn't experiencing unusual wear.
My other 911s don't do it near as much. They have less tire on the rear.
I think it is the fat tire cars that do this the most, and especially visible on white paint like yours.
If your tire wear is normal I wouldn't worry about it.
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Chuck Moreland - elephantracing.com - vonnen.com
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