On this parts fiche the Bolt,brk Disk 8x24 is the most specified component.
The Rear Wheel is made up of components including this Tire,rr(bs) which is the most expensive.
A sample from the products for the Rear Wheel include: Dust Seal,30x52x7, Arrester,noise, Bearing,ball Radial,, Nut,flange 12mm.