RK GB520RUWR is the new professional racing chain designed for middle class road racing as this chain is improved rigidity and durability while GB520RUWR has thin plate with light weight for excellent acceleration response with low fuel consumption.

RK GB520RUWR features RK’s only technology of Ultra Thin Seal, UW-Rings, minimizing the chain weight and friction loss possible.

RK GB520RUWR is special chain design for racing purposes, featuring high performance for the best lap time.  GB520RUWR is used for Moto2 and WorldSSP such as BARDAHL Evan Bros. WorldSSP Team.