Just got my tires changed this past weekend so adding my details. Unfortunately, I think I'm going to switch out my spacers b/c of the rubbing in the rear. May just switch the front to 12mm and get 5mm's for the rear.
Car: 2009 E92 M3
Wheels: OEM 220
Spacers: (F) 15mm (R) 12mm
Tires: Michelin Pilot Sport A/S+ (F) 255/35/19 (R) 275/35/19
Alignment: Factory specs
Rubbing?: (F) Barely (R) 100% on full lock and sharp turns