Product Review

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 GB428MXZ4 is ideal for professional level 80cc to 125cc open class racing. Pin length in mm: 17.6mm. Maximum wear life index: 300. Maximum tensile in pounds/feet: 5800 pounds/feet. Master link type: clip. Weight in pounds per 100 links: 2.13 pounds. Maximum cc: 250cc street/125cc off-road. 24.0 links per foot. 12.7mm pin to pin center. Your original purchase of RK sealed-ring chain is warranted to be free of defects in material and workmanship for 20,000 miles of street riding or one year of off-road use. There is absolutely no warranty of any kind for an RK chain used in any racing competition.