I replaced the belt tensioner already (last year), so I can safely rule that out. The tires are Michelin Cross Terrain, good stuff, had them for 30k miles already. They have been wearing out very evenly until last year I asked the dealer to perform a 4 wheel alignment (damn it, my mistake!!!!). Now 5k miles later, I see the rear tires wearing out faster on the outside. Looks to me that the camber was set too positive. Dealer claimed innocense, gave me a bunch of blahh.