There's a 5mm spacer on the Duster, what I think you're actually seeing is the aluminum hub. The brakes are Dr. Diff's 13" cobra-style kit. The offset on the rims is 35mm, but compared to a regular 73+ rotor the effective spacing is about 25mm (+5mm spacer, +3/16" offset on the rotor kit). So backspace on the 18x9's is effectively 6". The bottom front corner of the fender is pushed out a bit, I extended the bumper-to-fender brace to clear the tires. Its a lot tire up front.