Designed to reduce friction up to 50%, GYTR® QX-ring (Quadra-X Ring) chains last 50% longer than the conventional O-ring chains. The 520 GDX can be used for off-road motorcycles and sportbikes up to 750cc and ATVs up to 700cc. Designed to reduce friction up to 50%. Lasts 50% longer than the conventional O-ring chains. Chains are available in standard natural or gold finishes. Quadra-X Ring chain. Tensile strength: 8,500 pounds. Rated for up to 750cc sport / off-road bike or up to 700cc ATV use. Includes one rivet-style master link.