Rear wheel cush drive rubbers for Viper 125-200 cc motorcycles and similar (China, Minsk). The rubbers sit in the rear wheel hub between the sprocket and the wheel. They soften jerks during acceleration and braking and protect the chain and sprocket from shock loads.
Replace them when the sprocket has play relative to the wheel, you hear knocking when you close and open the throttle, and the ride has become jerky. The rubbers are replaced all at once as a set so that the load is distributed evenly.
A set of 4 pieces, "silicone" rubbers (according to the name), EVO brand.
