I have an 07 G35 Sedan AT with the upgraded wheel package. I believe it's the same wheels as the sport. I just got the vehicle, with almost brand new tires ,used in February and already have bad real bad tire wear on the front tires. I have put 6000 miles on the car, 75% interstate driving. The wear is even, not exclusive to outside/inside. I have not rotated them because they cannot be rotated due to the rim size. My question is that could this be a problem or is it normal. Also I noticed that the vehicle had 225/50ZR18 on all 4 tires so I could remove the front tires and remount them on the back($100) or just wait a few months and buy new fronts...something i don't want to do being very new tires. Any help with be greatly appreciated

Get an alignment.

Is the tire wear on the inside, outside, cupped tires, etc?

It looks pretty even to me. It just looks as if the front tires were on there for longer, I was staring at them for a while and could not see any trend in the wear. Will alignment fix front to back wear issues?

What tires did you get?
Is the car at stock height?

On my car, I don't recall the fronts wearing out that fast, but by 6k or so miles, I wore the backs down pretty far.

I have Goodyear Eagle F1 all season 225/50ZR18. Backs are doing great with very little wear