Example...tall tires need tall lifts and bigger axles, regearing, new driveshafts.....It all depends on what you need and how much money you want to spend. 31 tires and 2 spacers will take you down most trails and do not cost that much. 33 tires will give you more clearance, but need 3-4 lift, and other mods such as a SYE, new rear shaft, regearing and maybe upgraded axles are a good idea to m