They sold me 15x7 P225/70R for front and 15x8 P275/60R rear, yes I could have gone larger on rear I don't think I want any larger on front. But car hugs road a lot better and less spin on take off, the 14" did not cut it. I don't know what back spacing they never mentioned it but they did bolt on, it took a hour at least to mount and spin balance etc. Made a big difference in the look of the car.I have a Superbee also, same as your rt. What size tires and wheels are you using? Love the look of the Cragars, my favorite wheel. What backset are the rear wheels and could you have gone larger. Thanks and the car looks great.