Of all the components used in this assembly the Hub Rr.wheel is the most expensive.
The component with the lowest price in the F-12 REAR WHEEL schematic is the Spg-washer 16mm.
Some items from this specific schematic: Collar,a,rr,axl,d, Tube 450-17a Tr-6, Sprkt,final 39t, Flap,tire.