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Rear Tire Wear


GatorGT3

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2004 GT3 with 11,000 miles. Tracked car this past weekend and sensed some unusual vibrations at the rear. When inspected, noticed excessive wear on both rear tires on the inside. Have never had off track excursion or ever adjusted sespension. Did have some brake work done by Porsche dealership about 2,000 miles ago. Have recently installed an RS CF wing which is obviously producing more down force. Is is possible the sespension set up is not right for the new wing? Would welcome any comments.

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Sounds like your rear camber is setup fine with factory specs. The specs call for an aggressive (for street) negative camber to improve corner handling. This dictates that the rear tires ride more on the inside half of the rubber when driving straight, causing that area to wear sooner. For non track driving, you can dial down the amount of negative camber and reduce this tire wear.

If your are tracking the car, as you stated, this camber setting greatly improves your cornering ability. 11,000 miles is a lot of miles to get out of your rear tires, anyway.

Edited by 1999Porsche911
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With the factory alignment and no track time, 11K miles is pretty normal (actually pretty good) mileage. If you track the car, you'll get more even wear but not more miles! Enjoy those PS2s, they might not be the most economical tires, but for a combined street-track tire on an awesome car, they are hard to beat.

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With the factory alignment and no track time, 11K miles is pretty normal (actually pretty good) mileage. If you track the car, you'll get more even wear but not more miles! Enjoy those PS2s, they might not be the most economical tires, but for a combined street-track tire on an awesome car, they are hard to beat.

Thanks for the information. I kind of thought that I was pushing the life span of my PS2's.

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