RK 428Mxz1 Mini Racing Chain RK's MXZ Mini Racing chains are engineered for the competitive edge in mini MX and SX racing. Crafted with Chromoly steel for durability, they feature seamless rollers, bushings, and oversized alloy pins to enhance longevity, ensuring racers can push their limits with confidence. Features: Chromoly steel construction Seamless rollers and bushings Oversized, special alloy pins Includes clip-style master link Specifications: Tensile Strength: 6,070 lbs Max CC Rating: 150cc (Off-road) Max horsepower: 30 Note: Mxz1 chains are intended for mini MX and SX racing and are not recommended for street use.