Bruce, I just checked the data sheet for my wheels. The fronts are 15x7 with a 3.76" backspace and the rears are 15x8.5 with a 3.81" backspace. My tires are 225/70 on front and 255/60 on rear. I don't have any rubbing issues so far, front or back, however the rears are a bit tight getting them on and off. I had to jack the body up quite high to let the suspension full drop to get them on.
