215/35/18 on a 8.5j et30 wheel. Only rubs when im giving it absolute mental abuse on full lock. Other than that, not a single scraping sound.
Arches have been cut out from the front and top. But still kept them at the back section to stop s@3! going in there. Stones and stuff havent bothered me at all, and it happens very rarely.
Its always fun seeing smoke coming from your front arches though