backspace

Been looking at wheels, and I found some but they are 17x9 with 0mm offset (5" backspace) and when I run a calc, it says that it will be a full 2 inches further out that stock wheels. (17x8, 38mm offset, 6" back space) Does that sound correct? I've seen a few 17x9 +18 photos, and that seems...

Ok, so I have a 2 week old truck in my garage. I ordered this thing with the idea of lifting it 4" right off the bat. Well, my dealer made me a pretty good offer and so the 4" Mopar/Superlift kit is sitting at the dealer ready to be installed. Also sitting at the dealer are my color matched...