245's aren't for the rears...as stated above only for the front. Instead of adding a bigger rear bar (which isn't legal for stock) and making the rear end grip less, I'm going the opposite direction and making the front end grip more. I believe with the right spacer dimensions you can get 245's on the front. I have victoracer 225/50's on the front with no spacers now and they rub only during long hard sweepers. I think with a 1/8 spacer I can get a little bit more out of the front.

2004 Focus PZEV 2.3L - KW sport suspension, SP camber plates, Eibach front swaybar, FS intake, FS Stealth exhaust, 3.82 Final, Torsen ATB, Prothane MM insert, E1 CSVT wheels 1/4 mile - 15.201@89.4mph