I just recently bought a 2007 F250 crewcab, Lariat, FX4. It has the 20" wheels and stock suspension. I was wondering, could I install 325/60R20 tires on it with stock suspension? I don't particularly want to lift it, but I'd like to put on as big a set of tires that I can. I work for Michelin, we don't have a tire that size, but we happen to own a certain tire company that does. I'm thinking either, All-Terrain T/A KO's or Mud-Terrain T/A KM2's.