I have an 03' Z71 with keys (2" leveling kit) and am installing a 3" BL next week. I am also purchasing 18" rims soon. I want to know if I get the 18" rims possibly 10" wide how much offset do I run (-12 or -24) with no backspacing before they get to gawdy looking? Also with these rims and the 5" of lift I should have when finished what is the max tire height I can run with just trimming the bumper? With just the 2" leveling kit I was told I should be able to run 18"x10" rims with -24mm offset and a 285/65/R18. If this is the case with the extra 3" BL can I go up to a 295/70 or 305/70 with out hacking on the inner fender well much?