RK is the leading manufacturer of transmission chains for motorcycles in Japan. For more than 40 years RK has supplied all major Japanese motorcycle manufacturers as original equipment. Also in RC racing it is the first choice of many teams in MotoGP, motocross or even at the Paris-Dakar rally. RK EXW: The high load on modern road machines led to the development of the XW-ring chains. The XW-ring seal has six points and two stabilizers that prevent the ring from rotating in extreme conditions. Thus lubricant loss is avoided under all conditions - life is extended by up to 50% compared to an O-ring chain. - With XW-ring for longer life in the field - Six sealing points, two stabilizers prevent ring rotation - Lubricant loss is prevented - 50% longer life than O-ring chain - For ATV / Quad and off-road area