I just noticed this weekend that both rear tires are worn about twice as much on the inside of the tires than the outside. Is it normal for an independent suspension vehicle like this to have this problem. If so I wonder if it would be smart to make and alignment part of the 15,000 mile maintenance interval just to be safe. The beast has 22,000 miles on it and the tires are rotated every 7,500 miles. Anyone else face this problem? Is it a warranty issue or normal wear and tear I am responsible for? Thanks for the help.