I want to get the RPM R-505's. I'm looking at 18x9's on all corners...what should my offset and backspacing be, if any? (I don't want them to stick out. I want them to just barely tuck with no isssues in case of a bump)

Also, would a 275/40/18 be the perfect size on all fours? Would rubbing be an issue with that size?

I'm putting on the Eibach Pro-kit, Bilstein HD's and Adj-PHD this weekend.

Thanks in advance.