2000 BMW X5 Tirestreadbelt Problems

BOTH FRONT TIRES SUSTAINED EXCESSIVE OUTER EDGE TREAD WEAR. ALL OUTER TREAD OF EACH IS NEARLY GONE AT 17.5K MILES! WORN ONLY AT FAR OUTER EDGE (APPROX 1/2" TO 1") OF TREAD. REST OF TREAD ON BOTH TIRES IS VERY GOOD TO EXCELLENT FOR 17.5K MILES. INFLATION KEPT AT BMW'S RECOMMENDATION OF 32 COLD PSI. NON-AGGRESSIVE DRIVING. NO INDICATIONS OF OTHER SEVERE WEAR, USE, IMPACT, OR ABUSE TO THESE TIRES OR TO THE REARS. ALL ARE ORIGINAL TIRES. REAR TIRES ARE SAME BUT LARGER SIZE: 285/45R19. REAR TIRES IN EXCELLENT CONDITION FOR 17.5K MILES. FRONT TIRES SHOW CLASSIC SIGNS OF EXCESSIVE POSITIVE CAMBER. COULD BE FROM BAD ORIGINAL FACTORY ALIGNMENT, OR BAD FRONT SUSPENSION COMPONENTS LIKE SAGGING SPRINGS, WORN BALL JOINTS, OR WORN CONTROL ARM BUSHINGS. CAR ONLY SERVICED AT RUSNAK. NEVER IN ACCIDENT NOR ANY FRONT END DMGS. SVC. HISTORY SHOWS CAR NEVER ALIGNED. DEALER'S SERVICE ADVISOR VERBALLY ASSERTS...