E60 2008 535i 6MT with Sport Suspension. Original equipment is staggered 245/40-18 in front and 275/35-18 in rear. When the current tires are shot I'd like to go to a square set up but with slightly wider tires than the 245/40-18 original equipment non-sport set up. Looks like the closest set ups in terms of tire diameter are either: 265/35-18, 255/35-19, 265/30-19 or 275/30-19. I assume the 275's (and possibly 265's) are too wide to put on front, so that leaves the other three options (assuming wheel offsets are appropriate). My questions are: 1) has anybody made a similar swap with any of these sizes and how do you like it? 2) are there any issues going wider than the factory 245 set up in the normal square configuration? 3) or do I stick with a 245 and just go to 19" wheels, i.e. would a 245/35-19 simply be the best set up?