Not sure if this helps
275/30/20 on lenso d1r 20x10, lowered on pedders sports ryders and a few tools, non rolled, 16 mm clearance
Think it more depends on the offset but I don't really know much..
I realise I may b a little optimistic hoping for some answers on this subject so long after this thread died but I was curious as to whether the mud flaps were removed b4 taking it back to ford?