Sounds like you're rubbing in the same place as everyone else. Run your fingers along the edge of the fender, start from the top and make your way down towards the back of the car... when you get reeeal close to the rear bumper you're gonna feel a dimple in the metal.. That part is most likely the culprit.
Take the wheel off, put a piece of wood on that "dimple" and go at it with a hammer.. You want to bend it "in" the fender so it gets away from your tire. You could also grind it away but you better touch up the paint quick cuz exposed metal will rust!!
Hope this helps..
