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. DID 428HD: As the successor to the proven 428H, the 428HD uses a new technology to produce the wheels. Previously, the rolls were wound from sheet metal strips, creating an interface and thus a weak point. With the help of the new technology, the rolls are made of round material, thus avoiding a seam. Compared to the standard 428D chain, the 428HD is reinforced by thicker tabs and therefore has a significantly higher tensile strength. - 20-50% higher wear resistance compared to the DID 428HD - strengthened construction