D.I.D's top quality O-Ring chains are quad stake riveted with solid bushings for superior strength and long life. High-performance value of an O-ring chain. Average tensile strength of 3,560 pounds. Wear life index: 700. Ideal for off-road motorcycles up to 250cc. Weight (per 100 links): 1.60 pounds. Includes a clip-style (RJ) master link. Note for installing O-ring chains: As O-ring chains are wider than standard roller chains, when fitting an O-ring chain to a motorcycle that was fitted with a non O-ring chain as original equipment, it is essential to check that there is proper clearance of the engine cases near the countershaft sprocket and any other places of close contact. Failure to do so could result in damage to the chain and motorcycle and could ultimately cause the chain to fail.