The lowest price component in this Rear Wheel/chain parts-list fiche is the Pin-cotter,4.0x35.
Some items from this specific schematic: Damper,shock,rr Hub, Bearing-ball,#6304uuc, Ring,snap,56.2m/m, Coupling,rr Hub.
This REAR WHEEL/CHAIN assembly utilises two Bearing-ball,#6304uuc(s) - the highest specified component.