Although I had all the rear suspension parts replaced but the ball joint I was killing tires like crazy.
The ball joints were both bad but hard to tell without releasing the pressure from the air spring. After I replaced them I have even wear on the rear tires.

Make sure you fix the rear suspension before spend any more money on alignment and tires as I did.

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4.8is 2004 imola red
4.8is 2005 Black on Black - DINAN/2 sold
4.4 2004 X5
2003 330xi
2008 328xi - sold
4.4 2000 X5 - sold