Another Back Spacing Question
 

I'm considering get some 22''x11'' rims with tires LT 335/55 R22. What back spacing issues do I need to be aware of with this set up? Will 4.5'' or 5'' back spacing be sufficient to minimize any rubbing?
The whole back spacing issue confuses me. I did a search on the Forum and couldn't wade through all of the info to find a definite answer. Maybe I should just get a set of KMC Backseats like everyone else, since this is a proven set up:o