I'm running Pro Comp 1069 15x8 with 2.25 back spacing. I just put them on. I used this tech page for the proper back spacing, but the earlier post was with steel wheels that are balanced on the outside of the wheel. Wheel weights rub the tie rod ends when weights are on the inside of the wheel. After an hour with a 2lb sledge I got the weights flat enough to clear.....Just ordered 5/16 spaces for the front