The Rear Wheel is made up of components including this Hub,rear Wheel which is the most expensive.
A sample from the products for the Rear Wheel include: Rim,rr Wheel, Spacer,rr Axle,l, Bolt 6x40, O-ring (d:2.4 Id:13.8).
thirty-six components are shown in this Ds100 1978 (c) Usa (e03) Rear Wheel exploded diagram.