I went with Wheel Accessories Parts 15mm hubcentric spacers all around. 6x5.5/6x139.7 bolt pattern, 78.10 wheel hub. M14x1.50 thread ET 1.80" long lug nuts. 4" suspension lift in addition to the factory 2" TB lift. Does not give it too much of a wider stance, but my purpose was to alleviate the rubbing with as much minimal stress on the CV's, tie rods, upper and lower control arms, etc. So, I found the 15mm spacers were perfect. The more negative offset, the more chance of rubbing the wheel wells because of the angle of the turning radius. This is why I went with the 15mm; it gives me enough clearance from the UCA as well as no rubbing issues. I am running 0 offset 18" aftermarket wheels (Rough Country Series 84) with BFG KO3 305/70 18 tires. I removed mudflaps when I installed the fender flares. With this setup, I had to zip tie the wheel well liner front and back and did have to do minimal trimming of the L/R corners of the front bumper (a little cutting with SAWZALL).