Twin Power™ Drive Chain for American V-Twins. High-tensile steel, solid rollers and oversize pins ensure longer life and higher strength. The 530 Heavy-Duty is a perfect replacement chain for classic V-Twins with an average tensile strength 7,700 lbs. Includes clip style master link with a natural finish. 530 Z-ring provides the ultimate strength for all performance applications with an average tensile strength of 11,200 lbs. Includes rivet style master link with a gold finish.