Weird Tire Wear

[mdfud]

08 X5 4.8 w/ sport and 20" rims/tires, 20k miles. 20" tires are not run year round; run 19" in the winter. put 20's back on a couple months ago and noticed inside edges of all four tires are wearing; fronts are sort of cupping. stealer checked alignment said everything ok and wear like this is "normal" (that's what they all say). anyone else have this problem? is it "normal?"

[ard]

what are actual alignment numbers? Not just "OK" but what are they?

Reason I ask is the BMW specs are very wide and allow alignments that will destroy tires in short order...

A

[KYZRSOSE]

It sounds normal. Each set of my 20"ers in the rear typically wear very weird on the inside of the tire. This is due to the width of the tire and negative camber setup the X5's have.