Apparently they are different for the 19 (ford convert so not sure about previous models) and have a very small gap between the tire and ball joint. If you were going with aftermarket, I'm sure an offset would cure that but I wanted to stay stock for my wheels. I'd say nothing wider than right at 11.5" would work. The guy at the shop said they would have probably cleared with a 2" level but I wanted a little higher ride so went with 3" rough country.