I realize this was posted in June.......just thought I'd add to it.
I'm running a 15x8, 3.75 bs with a 275/60 tire. Centered the tire nicely in the wheel house imo. Rolled the lip slightly as the tire was 'rubbing' (not being cut) on the outside lip.
Not sure if it was rubbing on turns, bumps, or what. With the car parked the tire's nowhere near the lip, so.........just another mechanical phenomenon.