A sample from the products for the Rear Wheel (gp100x/ux/d/ud/ul) include: Nut, Washer, Spring(l:34), Nut.
The lowest price component in this Rear Wheel (gp100x/ux/d/ud/ul) parts-list fiche is the Washer.
The thirty-eight Gp100u 1981 (x) United Kingdom (e02) Rear Wheel (gp100x/ux/d/ud/ul) component parts are all listed in this schematic.