Good to hear lots of others have rubbed curbs, my model 3 right side wheels are ground down too. looking at the Michelin website I see the Primacy tires can be mounted on wheels from 7.5 to 9 inches wide. Are the base 18" wheels 9 inches wide? If so would 7.5 inch wheels make the tires hit curbs before wheels? Seems to me that would be a good thing for us curb rubbers. I have replaced ground off metal with Goop epoxy filler on one of my wheels, then painted over with blue to match the body. looks better till I hit another curb. Just painted over damage on the other.