What I have in mind to go with 18" beside 19" is for our hard winter.
My 435i doing limit fine on bumpy road in confort mode with 19".
I think that the ride risk to be too rough with 19" on icy and snowy road...
I really want to know if, for exemple, a set of Avant Garde M310 Wheel 18x8 5x120 35mm will clear my M sport caliper before pulling the trigger...