A 520 O-Ring chain designed for the extreme rigours of off road use Nitrile O-Rings extend chain life by retaining special vacuum injected grease inside the chain jointHigh carbon alloy Shot-peened alloy steel side plates for high tensile strength and maximum impact load resistanceChamfered inner links to help reduce the chance of cahin derailmentExtended bushins to reduce frictin between inner and outer link platesShot peened solid rollers and chromized pins help to extend service lifeGold anodized side plates help prevent corrosionPre stretched to enhance performance of the chainEach chain includes masterlinkAverage tensile strength is 7642lbs
