[x33rs]

Well, I'm hesitant to recommend, then not working, lol.

I know for sure on mine a 235/60-15 won't work. I'm currently running 215/65-15's and those 235's are .7 of an inch wider tread, .8 wider on section width and a tenth taller. Right now the 215's on mine as I mentioned will on occasion rub the top inside of the fender. That's all. Doesn't touch the actuator covers. I can go with a taller tire on the front, but definitely nothing wider. Matter of fact, I'd rather have something a little narrower and taller at the same time hence why I'm going with a 70 series next time around.

Where my 215/65's are rubbing currently I can deal with. It's just barely touching the top inside inner fender when I back up over a bump or weird incline, I can hear a slight tire rub at full lock. I can back off the wheel 1/4 turn and it goes away. It's nothing drastic at all and it's a rare occasion it even happens. But it would certainly be worse and more frequent if I put a wider tire up front.

Now a 225/60 would probably work on the front of mine. It's only .3 wider on section width and .4 wider on tread width than a 215/65, but where I would gain clearance with that 225/60 is the fact that it's shorter by almost a half inch. So the gain in width, but shorter tire would likely clear the top inner fender.
My issue is then the whole car sits even lower in the front, LOL. What I would like to have is more ground clearance (without changing the original springs) so I can maneuver over some of the huge speed bumps around town. Right now with 215/65's it's borderline low and I have to be careful. It sits much like your picture, probably mine is slightly lower up front. I'd like a 70 series up front to gain an inch in height, and give me another 1/2" ground clearance. Doesn't sound like much but sure helps. The factory tires on a Z are almost 27" tall anyway, so I'm wanting to stick in that range. Right now the 215/65's are barely 26".