I put 235/40/18 on the front with the stock rims and I had 1 mm of clearance with that A-Arm bolt. That was with the car in the air with the wheel mounted. Not enough for me with the way I drive the car. I ended up with 10 mm spacers on each side in the front. Looks great! The 235's are 4 mm taller. I put 265/35/19 on the back and there's still tons of room. Not for a taller tire, just wider. I have 5 mm clearance at the bottom of the fender lip with the car on the jack. So don't go any taller. You can go much, much wider if your willing to experiment. I'll try and take some photos later today. Oh, I'm running -1.6 camber on the front. With a stock alignment you should have more clearance.

Les