DID is a Japanese manufacturer of high performance transmission components, recognized worldwide for the quality of its chains that are used in the largest world championships such as MotoGP and Superbike.
The ERV7 chain is an evolution of the previous ERV3, which in the last decade has always been at the center of competitions.
The tensile strength has been improved by 3%, the life of the chain longer by 13% and finally a new X-Ring seal has been patented.
