i am looking at a set of 16x8 rock crawler 51 series, with a lug pattern of 6-5.5, and a backspacing of 4.25inch my question is how much more will this back spacing make my tires sick out and will it clear all brakes and ball joints and so on. also i can not find a center bore size. isn't the center bore i need like 110cm? please help. thank you