Renthal's R1 Works Chain is a high-strength non O-ring chain with excellent impact load resistance designed specifically to withstand the stress found in off-road applications. This chain is the choice where a combination of high strength, light weight and maximum power transfer are important considerations. Shot-peened alloy steel side plates for high tensile strength and maximum impact load resistance. Chamfered inner links to reduce the chance of chain derailment. Extended bushings to reduce friction between outer and inner link plates, maximizing power output. Chromized bearing pins for excellent resistance to wear. Gold color side plates help prevent corrosion. Most perfectly matched chain for Renthal sprockets allowing maximum power at the rear wheel. This also extends the life of both the chain and sprockets. Average tensile strength of 7,644 pounds. Wear life index: 300.