Funny you ask... I have been beating my head against the wall the past 2 weeks on this question. In summary, getting new F30 staggered set up with 19" rims. Avant Garde M310 eventually when car gets here from deutschland. I have received so much information I believe a good set up where nothing is compromised on your car, no rubbing, no DSC issues... go with 235/40/19 fr and 275/35/19. I believe my ET is 35 fr and 43 rear for that particular wheel. I spoke with J at Getyourwheels.com and he is very very knowledgable about wheels. Explain different years on 3 series and different set ups, calculated mm on the spot with over all height measurements, etc. Give him a call and tell him his latest nut job, Mike Watson sent you. He will get a good laugh for sure. I've been driving him nuts lately with a million questions.
