I rubbed on the rear on 220M's, stock height 275/35 PSS in the rear with 12MM Spacers. Rubbed on any bump if I was going quick enough, and all bumps with passengers.
Now have 10MM, and they never rub. Moved the 12mm to the front and have had no issues.
E92 M3 - Track Rental
F80 M3 - The groceries won't get themselves.
Mclaren MP4-12C - ATS Package
F85 X5M - Work Truck