Dominator2, its the USAF/land based derivatives that had the larger main wheels and tyres, 11.5 inches wide against the Navy's 7.7 inches. To accommodate the larger wheels/tyres the inner wing upper surface had a slight bulge as did the main undercarriage doors, only the F-4J/S and the last 12 RF-4Bs (post SLEP) also had the larger wheel/tyre combination.
-RP