D.I.D is a Japanese manufacturer of high-performance transmission parts that is renowned worldwide for the quality of its chains & chain kits. This make is closely involved in competitive motorcycling & develops its chains in partnership with numerous world championship teams. * 520 MX type chain * Strongest MX chain, has higher tensile strength for maximum performance & is ideal for hard conditions * Made up of non-O-ring links * SDH treated chains: anti-rust properties, reduced friction & greater resistance to projected materials * Anti-oxidation good properties Article: D.I.D 520MX Drive Chain 520