Chain 520Quad Gb 118C 135Quad/00E520 QUAD Drive Chain The ultimate ATV chain, developed to withstand the severe stresses of ATV riding, yet lightweight with maximum performance QUAD chains feature the patented Z44 sealing rings, which greatly improve performance and wear life, making previous X ring and Z ring chains obsolete 50% reduction in friction compared to traditional O rings Constant lubrication from special high temperature grease in the critical pin bushing area provides