I'm looking for info on how to measure how much backspacing is needed or how big of a wheel I can run. I read through 6 pages of searching backspacing but have not found what I need. Basically I have no wheels and need a place to start deciding on size, backspace, so on and so forth. Thanks

There's a thread at the top of the wheel and tire forum that has this link in it showing most of what you need to know about wheel fitment...

http://www.rsracing.com/tech-wheel.html

lay a straightedge across the mounting flange, and start measuring.

Thanks, I meant to post this in the wheel and tire forum but I guess I was tired.