RK GB520XRU is developed for Superbike Road Racing, featuring MotoGP Racing Chain Design Technology, to be only 15.6g/link.

RK GB520XRU features RK's only technology of Ultra Thin Seal, UW-Rings, minimizing the chain weight and friction loss possible.

RK GB520XRU is special chain design for racing purposes, featuring high performance for the best lap time used by International Top Teams racing in MotoGP, World SBK and British Superbike.