DID is the OEM of many Japanese and European brands. Leading racing teams in the Road and off-road sports rely on the technology of DID. DID ZVM-X: As a successor to the proven high - performance chain ZVM2, ZVM-X is particularly suited to the various loads encountered in everyday life. In this case, the tensile strength only indicates the fracture load of a chain determined statically in the laboratory, But not the resistance to the forces occurring in practice. For this reason, ZVM-X focused primarily on strength in use. An increased tensile strength and -lower weight compared to ZVM2 - very high wear resistance and - up to 50% reduced friction losses due to the patented X-ring technology