With the 12.5 tires you probably would want to run an 8" rim anyway. Otherwise you have to worry about losing the bead when you air down. Maybe someone with this setup can speak up with better advice ?
2005 Rubicon :
4.0 Automatic,4.11 gears,4:1 Transfer Case
Teraflex 3" Coils,Rancho 9000x's,35" KM2's,(fenders...what fenders?), Cobra CB, Lowrance Baja 480c GPS,2"Wheel Spacers, Big Daddy Tie Rod,Superior Evolution Shafts.