Premium quality, high-strength, lightweight O-ring chain designed for racing. The choice when high strength, light weight and maximum power transfer are essential. Shot-peened alloy steel side plates. Nitrile O-rings retain a special vacuum-injected grease around the critical pin and bushing area. Ultra-high 7,650 lb. tensile strength. Chamfered inner links reduce the chance of chain derailment. Chromised bearing pins resist wear, especially under off-road conditions. Extended bushings reduce friction and improve power transmission. Gold-colored side plates and copper-colored rollers help reduce corrosion. Most perfectly matched chain for Renthal sprockets.