RK Chain MM525ZXW-120L XW-Ring - GreenRK's ZXW series is used for both racing and general use. ZXW and RK's Drag Racing Chain 530PRODR are each made for very different disciplines, but both share the same racing technology which provides the ultimate in high performance drive chains. ZXW features MotoGP and FIM Suzuka 8 Hour Endurance technology and has proven superiority by winning 35 first place finishes out of 39 races at the FIM Suzuki 8 Hour Endurance Race. Several features are