DID is an OEM of many Japanese and European brands. Leading racing teams in the Road and off-road sports rely on the technology of DID. The 532ZLV is sealed with patented X-rings which, thanks to their special shape, that the lubricant remains encapsulated for a very long time. Compared to a comparable O-ring chain the friction is therefore reduced to half and the service life is significantly longer. - Long life thanks to patented X-ring technology