The Washer(12.5x20x1) is the cheapest item from this partsfiche.
The Rear Wheel is made up of components including this Rim,wheel(17x1.20) which is the most expensive.
Parts such as the Rear Wheel: Rim,wheel(1.40x17), Nut, Bearing(17x40x12), Shaft,rr Sprocket Drum are included in the As50 1971 (r) Usa (e03) Rear Wheel parts fiche.