I have an '05 4.4 with the OEM 19" 132's with Michelin Diamaris and am experiencing tire cupping on the front tires. I check the tire pressures cold and on a regular basis keeping them slightly about recommended (38 PSI F+R). I only have 13K miles on the vehicle and 10K on this tire package (I run snows in the winter). I have approached my dealer who is going to talk with the BMW rep to see if they will authorize an alignment check; although I have not hit anything and the vehicle tracks straight as an arrow at speed. The disappointing thing is that the tires are starting to be noisy at freeway speed and two new front tires are obviously not cheap.

Can I rotate these LF for RF or swap tires from front wheel to front wheel??
Are Michelin Diamaris unidirectional??

Any suggestions, comments, or personal experience with this scenario are appreciated!!!

TD