I looked for threads concerning this but came up empty. I am confused on what I need to get for wheel offset and backspacing in order to not have any issues with rubbing. I know the factory 18" is 8" wide with 25mm offset right? So what do I want for an offset and backspacing for a 8.5 or 9 " wide wheel. If it helps any, I'm looking at the kmc xd795 hoss wheels, 20x9 and plan on running 33x12.5-20. The options are -12, 18, and 30 offset. 4.53in, 5.71in, and 5.18in backspacing. And also what is hub bore, I have the option of 108 and 78.1. As you can tell I'm really confused right now. Thanks in advance.