520 R4 - ATV Z-Ring Chain - 100 LinksCaracteristicas: Patented Z ring seals dramatically increase the life of the chain by trapping specially formulated grease around the critical pin and bush area Larger diameter pins manufactured from specially enhanced steel improve the resistance to shock loads A quad riveting process on each pin increases the tensile strength of the chain Thicker inner and outer plates increase the fatigue life of the chain Recommended for engines up to 900cc