[6seriesgc]

Hey guys....I currently have stock 19s (245/40-19) run flats and would like to upgrade to wider tires. My wheels are the 351M all season, so the length of the wheel is measured at 8.5.

Is it recommended to have a square setup or can I go stagger.

For either option, what is the widest I can go in front? I was thinking 275-35-19 all around but unsure if this will causing rubbing.

Im leaning more toward 255-40-19 (f) and 275-35-19 (r)...or...265-35-19 and 275-30-19. Any issues with this configuration on the 640xi?