DID is the leading original equipment manufacturer with nearly 70% of all Japanese Motorcycles and many European brands. Leading racing teams in the Road and off road sports rely on the technology of DID. DID chains offer you a good price-performance ratio at high, controlled quality by research and innovation constantly is developed further. An exclusive hardening process of the bolts increases the performance of the chains. This special process creates a hard surface Layer, the bolt core remains soft. The bolts get by a tremendous impact force, shocks are absorbed so easily