CE Smith 8 x 6.5 Tapered Spindle Trailer Hub Kit The CE Smith Trailer Hub Kit is designed with pre-greased bearings. cutting down on the mess by producing a final installation onto the axle. The hub kit is made of a galvanized material making it durable in marine environments. The kit includes a dust cap, cotter pin, and lug nuts. Specifications 8 stud x 6-12 bolt circle diameter 1-34 tapered to 1-14 shaft 3500 lb capacity 16 maximum wheel size 2.71 hub inner diameter 8-12 wheel flange diameter