RK is the leading manufacturer of motorcycle drive chains in Japan. For more than 40 years RK has supplied all the major Japanese motorcycle manufacturers as original equipment. Even in RC racing it is the first choice of many teams in MotoGP, motocross or even at the Paris-Dakar rally. RK ZXW: The ZXW chain is a development of the GXW series to meet the needs of the latest generation large-displacement street motorcycles to meet and is characterized by extremely high tensile strength. Due to the particular shape of the XW-ring, the chain is sealed at six sealing points, so as to avoid loss of lubricant in all conditions - life is extended by up to 50% compared to an O-ring chain. - XW-ring chain - Six sealing points, two stabilizers prevent rotation of the rings - Loss of lubricant is avoided - Life 50% longer than O-ring chain - Extremely high tensile strength