I'm the crazy 16x7 front 16x8 combo with different tire sizes on his chart. When we first test mounted/ordered my rims the wheel store said 16x8 wouldn't fit all the way aroundbut I later found out they probably would have with proper backspacing. I know that the 17" guys run 8" wide rims with 4.75" all the way around, an 8" wide rim is an 8" wide rim regardless of the rim or tire diameter, so IMHO a 16x8 w/ 4.5-4.75" backspacing would fit all the way around with minimal clearancing. Obviously to run 16"s you have to clearance the upper control arm lip as the 17" rims clear it and the 16"s intersect, easy 30 second grind, and to maintain optimal tire/fender clearance you're going to want to roller your fender lips. My 225/50/16's fit the front PERFECT though I don't know exactly how much backspacing I ended up with after going to the 7" rim and changing to disc brakes could've effected my setup too. I'm pretty sure it's just a 4" backspaced rim but I believe the SSBC front disc brake kit added some(maybe like 1/8" or so) and gave me a little more room. My rears are 16x8 with 4.5" backspacing, and the 235/55/16 nitto street tires or my 27x10.5x15 mt streets fit just about as tightly as possible, less than 1/4" between the tire edge and inner leaf spring wheelwell lip.