Excuse me guys for being a retard but i,ve never really worked with wheels or tires. I have a couple of questions. What is the difference between backspacing and offset? (I've seen offset on truckperfomance.com) Also, how does backspacing work? Is it that the smaller backspacing you have, the further out the wheels stick, or the other way around? Also, with a 2" lift, i would like to get a 31x10.5x15 tire on a 15x8 rim. What backspacing will i need to avoid rubbing and still stay fairly stock looking( in terms of the wheels sticking out)? Thank you for the help, i appreciate it!