Went and got an alignment yesterday. I bought the car lowered with 350Z touring wheels on it... Apparently they are of a staggared offset and while the front wheels lined up fine with 1.5* of camber, the backs rub at anything less than 3.0*. I have 225/45/18's on it now, and I know people run much wider tires than that on these cars, I just can't figure out how. What do you suggest? Rolling the fenders? Finding new wheels? I can't raise the rear of the car back up because it has lowering springs (the front has coilovers... I know... strange... I bought it that way).

So Any ideas how I can fix this and get some decent tire life?

 

I'm running those wheels with 255/40/18 in the rear. When I switched from 245 to 255 I had to roll my fenders, so you may need to as well. Now I'm running with a 15mm spacer in the rear with 255's and still not having any rubbing issues.

 

I'm rocking the G35 18's (same set up as your rims. First thing is to drop to a 40 series tire not a 45. Then roll your rear fenders and you will be money!