The Spoke-outer,123.5mmx8 is the lowest priced item on this Wheels/tires schematic.
Parts such as the Wheels/tires: Rim,1.40x16w, Spoke-inner,rr,124.5m, Tire,2.50-16,nt-102, Rim 1.60x14w are included in the Km100-a7 Km100 1981 Usa Canada / Mph Kph Wheels/tires parts fiche.
In this schematic the "Spoke-inner,fr,147.5m" is used most often.