I have a 2010 Challenger, 32k miles. I've always had the tires rotated with every oil change, always at the dealership. Noticed yesterday on a road trip the rear passenger tire is bald - completely smooth! What gives? I'm looking at anywhere from $202 - $218 for Michelin Pilot tires, P235/55R18. Any ideas on why this might happen? Perhaps the dealership wasn't really rotating my tires? I'm used to truck tires which never gave me a lick of trouble. All comments / suggestions are appreciated. Thanks!