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Originally Posted by Paul
The wear is on the inside of the tires.
Here's the "after" readings from the alignment I had done 22,000 miles ago:
Camber: Left 0 degrees 12 minutes Right 0 degrees 2 minutes
Caster: Left 7 degrees 52 minutes Right 7 degrees 44 minutes
Toe: Left 0 degrees 2 minutes Right 0 degrees 3 minutes
I used these tires to drive 7000 miles to the last two Parades and back, but the rest is mainly in the twisties. Both trunks were fully loaded for the Parade trips.
BTW my rear tires always wear out with the same pattern every 15,000 miles. During the same alignment the rears were set at:
Camber: Left minus 1 degree 40 minutes Right minus 1 degree 42 minutes.
Toe: Left 0 degrees 5 minutes Right 0 degrees 6 minutes
Total toe: 0 degrees 11 minutes
Thrust angle: 0 degrees 0 minutes
The car has 57,000 miles...
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My vote is have the alignment checked. Excessive weight in the front could give you enough camber to wear out the tires in this fashion. Combine this with out of spec toe and it gets worse. Out of spec caster through a lot of sharp twisties could also give you a similar wear pattern. Regardless of the likelihood of any of these, I still think it would be peace of mind to have the alignment checked with new rubber and before you set out for a long journey.