The Rear Wheel assembly is constructed from several parts from which the Axle Comp,rear is the most expensive.
The lowest price component in this Rear Wheel parts-list fiche is the O Ring(d:2.4,id:31.7).
A sample from the products for the Rear Wheel include: Tire(at 22x10 8), Hose,rr Brake Breather, Bolt(6x35), Nut.
