DID is the leading original equipment manufacturer with nearly 70% of all Japanese motorcycles and many European brands. Leading racing teams in road and off-road sports rely on DID technology. DID ERV3: The ERV3 was developed especially for racing and, despite the X-Ring seals, stands out with its extremely low weight of just 15.00 g / link. For this reason, it is used, inter alia, in numerous racing teams, for example at Yamaha in MotoGP, application. For both road and off-road racing DID recommends a use up to a maximum of 750ccm. - very low weight - Low friction losses due to patented X-Ring technology - Gold colored inner and outer plates (G & G = Gold and Gold)