CE Smith Boat Trailer Wheel Hub Assembly KitThese hubs come fully assembled with pregreased bearings, which cuts down on the mess and makes final installation on to the axle much easier. Includes carry case, dust cap, cotter pin and lug nuts. 4 studs x 4" bolt circle diameter; 1" straight shaft; 1250 lb capacity ; 5-9/16" wheel flange diameter; 12" maximum wheel size; 1.98" hub inner diameter;