For more than 40 years RK supplies all major Japanese motorcycle manufacturers as original equipment. In RC racing it is the first choice of many teams in MotoGP, motocross or even in the Paris-Dakar Rally. RK XSO: This is an improved form of O-ring chains.
The particular shape of the X-ring chain is sealed with four sealing points, the lubricant cannot escape. In addition, X-ring is used as an additional lubricant reservoir. The life of the chain is extended by approximately 30%. This technique was further developed at the RK XW-Ring chain.X-Ring chain - four sealing points - the lubricant cannot escape - life is extended compared to the O-ring chain by 30% - the further development of the X-rings are the XW-rings The JT.