RK is the leading manufacturer of drive chains for motorcycles in Japan. For more than 40 years RK supplies all major Japanese motorcycle manufacturers as original equipment. Also in racing RC is the first choice of many teams in MotoGP, Motocross or even at the Paris-Dakar Rally. RK GXW: The high stress in modern street machines led to the development of the XW-ring chains. The XW-ring seal has six points and two stabilizers which prevent rotation of the ring in extreme conditions. So the loss of lubricant is avoided under all conditions - the life is prolonged by up to 50% compared with an O-ring chain. - XW-ring chain - Six sealing points, two stabilizers prevent rotation of the rings - Loss of lubricant is avoided - 50% longer life than O-ring chain