I'm not the lucky driver who is driving the G35, but I'm telling the driver what he should do with his car, and I'm thinking to put on some 20"x9.5" Giovanna Attack rimz on. I asked a good friend of mine, he said "20's on the car would fit easy"...
since the Attack wheels are comming only in a set of 20's, I have no choice. Because I like it and he likes it too.

I know those rimz are for SUV's but if 20's fit on the G, then I do it. And 20 inch is the max anyway you could put on the car.