RK GB520XRU UW-ringchain (Only for Racing -1000cc) (GB520XRU-124+CLFZ)

RK Racing Chain Series apply RKs only technology of Ultra Thin Seal, U-Rings or UW-Rings, where the thickness of seal is less than 50% of the common seal, make it possible to design a Sealed Chain with the weight of a Non-Sealed Chain.

RK Racing Chain Series are designed strictly for Racing ONLY, Do not apply them for Street Use.