- MX Series chain designed for motorcross
- Non-sealed 520MX boasts D.I.D's highest rated tensile strength among non-sealed chains at 8,930 lbs. and properly handles the beating that chains take during tough, off-road races
- Because of its incredible strength, this is the go-to chain for riders across a multitude of racing disciplines, especially among the 450 class
- Trusted and used by many teams and champions