I took the wheels off my 06 Boxster and didnt keep track of which side which tire came from. I noticed that one of my rear tires is evenly worn significantly more than the other rear. Is one side of the rear slightly heavier than the other? Alignment is good. Front wear is even. Its not part of the rear tire but the entire surface is evenly worn more than the other side. I want to put the wheels back on but I want to swap sides to even the wear.