Last edited by Das_Boost; 09-26-2010 at 08:44 PM.
The rubber is stronger than the fender liner - they'll wear through the liner. Negative camber will wear the inside of the tire faster than the outside though.
My Syncro has -2.5 degrees of camber in the front, and -4.5 in the rear. Over 7000km I don't see any difference in tire wear.