20mm spacer out back and those wheels and tires wont need a fender roll. you will hit the fender tab before that happens. Tire size will be good too. just don't run too low. I was around 26.5" from ground to fender as nissan tells you to measure, running 275/40r18. now I am on 315/30r18 but I had to raise the car a little keep the 315 off the fender tab under heavy loads and bumps so its 26.75" now with the shorter but wider tires.
Heres the 315 with the car a little higher than I needed because I wanted to be sure they cleared. It was 27" in this photo
_BES6507 by
brendan sobers, on Flickr
and here is an older photo on the 275. I could get much lower since the tires were more narrow. same camber with both setups. -3.5~
_BES6734 by
brendan sobers, on Flickr