Currie supplies new 13-inch rotors for the front axle. The Currie hub is based on the super strong Ford F-450 unit bearing. Often misconceived, the strength of a unit-bearing hub can be tremendous. Ford has made sure the bearing style of this hub would hold up to the engine weight and GVW rating of the F-450 truck. Currie has taken the strength benefit of this bearing design and added lockout hubs from Mile Marker and an internal tone wheel to suit the JK computer. This is absolutely the best of all worlds for a JK hub.