D.I.D 415 ERZ Series Racing Chain - 120 Links , Chain Length: 120, Chain Type: 415, Chain Application: All, Color: Gold 415ERZ-120 High-performance, lightweight, low-friction chain designed to meet the performance needs of Moto3 racing ERZ chain is upgraded with exclusive Super Dai Hard pins put through a special patented heat-treatment process that makes them 1.5 times harder than conventional carbon heat treating Twice the wear resistance of original D.I.D. 415 ER chains, and the 4,540 lb. average tensile strength is a 15% increase