RK Heavy-Duty Chains (MXZ/MXZ4) RK GB428MXZ X 120 Links

Made for the Serious Motocross Racer with All Components Heat-Ratered For High Performance and Duratures Features Chromoly Steel Construction With Seamless Rollers and Bushings, and Oversized Alloy Pins for Add Strength MXZ4 IS THE LIGHTEST AND STRONSTEST MX CHAIN ​​ON THE MARKET Trength and a Weight of Only 2.89 lb. Ideal for Professional Level from 80cc To 500cc Open Class Racing Chains Include Clip Connecting Link GB 420 MXZ - Made for The Serious Motocross Racer for Street Bikes Up To 150cc and Dirt Bikes Up To 125cc Maximum Tensile Strength of 5,000 lbs. GB 428 MXZ - For Street Bikes Up To 250cc and Dirt Bikes Up To 125cc Maximum Tensile Strength of 5,800 lbs. GB 520 MXZ4 - WORKS MX RACE CHAIN ​​FOR 125CC TO 500CC APPLICATIONS MAXIMUM TENSILE STENGTH OF 9,000 LBS. Wear Life Index of 300 Heavy-Duty Chains (MXZ/MXZ4) Gold 428 MXZ HEAVY-Duty Chain RK GB428MXZ X 120 Links