RK Racing Chain 428MXZ-130 Steel 130-Links Heavy Duty Chain with Connecting Link 428MXZ chains are made for the serious motocross racer looking for the lightest, strongest non O-ring chain 428MXZ chains feature chrome-moly steel construction with seamless rollers and bushings, and oversized special alloy pins for added strength All components are heat-treated using RK's exclusive HIT (Heat Induction Transfer) process 428MXZ racing chains are the strongest in their class giving you the best value-performance rating of any MX racing chain in the world today With a maximum tensile strength rated at 5800 foot pounds and weighing in at only 2.13 pounds, the 428MXZ is ideal for professional level 80cc to 125cc open class racing