D.I.D Racing Chains 520X120 MX Gold
All D.I.D ER chains are designed exclusively for racing. 520MX chain has higher tensile strength for maximum performance and is ideal for muddy and sandy conditions.D.I.D's exclusive SDH pin treatment is featured on our 520ERT2, 520 MX, 520DZ and all NZ Series chains. This hi-tech pin treatment forms an extremely hard chromium carbide layer on the pins surface while maintaining a soft inner core. SDH treated pins have extreme impact strength while maintaining outstanding shock absorption. SDH treated pins have extreme impact strength while maintaining outstanding shock absorption. This treatment creates a chain with superior wear resistance against invasion of hard foreign materials.