DID 520 ZVM-X - Drive Chain - 120 Link - Black280711608 Product Description Retains all the low friction, high performance characteristics of the standard X ring while providing 40% greater wear resistance and better overall chain life Designed for heavyweight motorcycles with tremendous torque and horsepower ZVM X Series is only available with a rivet connecting link, included with the chain ZVM X Series utilizes D. I. D's patented X Ring seal and has greater strength than the VX Series and is