The rear tires on the Z have negative camber that probably evens out (goes to 0 camber) during cornering. The front tires are factory set with near 0 camber. When tracking, cornering shifts the camber to positive and wears the outer edges more than the inner. Ideally, a track setup would have more front negative camber and leave the rear alone.
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2013 Cadillac V-Wagon, RIP Z
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