Dropped on KW HAS
Factory tire sizes mounted on Vorsteiner VFN-501 so they stretch a bit giving extra tire to fender clearance. Not relevant in the front but definitely in the rear.
I like my cars mildly stanced.
20X10+20 - No spacer (although max of 5-8mm would fit if hub height wasn't the issue)
20X11+28 (Effective +17 - H&R 11mm hubcentric spacer in rear) this is max you could fit without rubbing at this height..