I’ve seen on the Ford forums where people are buying a second set of 17 or 18 rims just to keep snow tires on. You can’t put chains on the 20’s. So I figure the brake rotors will fit.
I started a thread asking about just downsizing the rims permanently for all-seasons a few days ago but got zero replies. I haven’t found a reasonable set of 18 inch alloy wheels that I can afford yet. I’ll call around to the tire shops to see what they have.