I have these on my car I think the widest is 18x10, I'm not sure though. The sizes I have are 18x9 and 18x10. Because of the offset that they offer for the rear (41mm), the widest you can go w/o rolling the fender is 275, and there's STILL a good chance of rubbing under hard driving. I have 255s up front with offset 44mm on the rim, and it looks like there will be plenty of clearance for 265s. I'm not sure if you would want 265 front/275 rear though
Tirerack sells these guys for $539 front, $559 rear. I might be able to help you get a better price if you're really interested in getting them. Just let me know..
mkivsoopra thanks for the reply real cool pic of your car and wheels. Your right about wheel just clearing the fender! Really want rear wheel which can hold 295 without fender bending. Anything that looks like the SSR's?