I came from 19” 442M (non run flat) on a 340i and now have the 20” 666M on my M3.
The 20” is noticeably rougher on the same terrain. Haven’t hit a pothole yet but I’d imagine they’re more susceptible to damage than the 19”.
I did curb my 20” wheel like an amateur at not even 2 weeks into ownership. Couldn’t stand looking at it so I bought a new one.
Old wheel for sale here
https://f80.bimmerpost.com/forums/sh....php?t=1552709