The Spoke-inner,rr,179mmx is the lowest priced item on this Wheels/tires schematic.
On this parts fiche the Nipple-spoke,8x9x20(+ is the most specified component.
Some items from this specific schematic: Tire,fr,70/100-19 42m, Tire,rr,90/100-16 52m, Band-rim, Band-rim,x-16a(bs).