85,000 miles and on my 2nd set of 19" Diamaris tires on my 2001 4.4i S/P which has NEVER BEEN ALIGNED (or curbed) since purchase. The cupping & noise is normal wear. Also, these wide tires wear in the center. which again is normal. I got 50,000 miles out of my 1st set and now have 35,000 on the second set which look to go at least 50,000. The tires are non-directional and the rear tires can be "flipped" on their wheels to counter the negative camber wear thereby doubling their mileage. I carry the recommended 32 psi in all the tires except when towing where I increase the rear tires to 39 psi as BMW recommends.

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A good pessimist is never dissapointed!