RK Racing Chain GB428MXZ-134 Gold 134-Links Heavy Duty Chain with Connecting Link GB428MXZ chains are made for the serious motocross racer looking for the lightest, strongest non O-ring chain GB428MXZ 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 GB428MXZ 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 GB428MXZ is ideal for professional level 80cc to 125cc open class racing