I have a set of OEM 18's mounted with 245x35x18 f and 275x35x18's r Michelin PSS4's. This combo is pretty good. I got them from Tire Rack. Had them mounted, but soon figured out that I could have had 255/35/18's in f which is even better to match the 275/35/18's in the rear. That would be the combo I would choose. Matches the roll rate of the car front and rear to even out the inherent push.