![RK 520XSO RX-Ring Motorcycle Chain 106 Links (520XSO-106)](http://roco4x4.com/cdn/shop/files/c009c59d-94ad-4f18-9a18-bba38bb69868.df34a79c7441f0433183b6d6043a139a_c4c3dace-59d9-4b4a-a692-175c87d37824_1001x661.jpg?v=1714455074)
![RK 520XSO RX-Ring Motorcycle Chain 106 Links (520XSO-106)](http://roco4x4.com/cdn/shop/files/c009c59d-94ad-4f18-9a18-bba38bb69868.df34a79c7441f0433183b6d6043a139a_c4c3dace-59d9-4b4a-a692-175c87d37824_1001x661.jpg?v=1714455074)
Description
The RK Chain factory has made a running production upgrade to their best selling 520XSO chain. The new upgrade GBXSO and non-gold XSO chains features RK's proprietary "RX-Ring" seal design and is offered in 520, 525 and 530. All versions are available in either gold/gold or standard steel color. Viewed in cross-section, the RK "RX-Ring" has two lubrication pools and seal points versus the single seal point/pool design of a regular O-ring chain. RK's new GBXSO chains offer quality, performance and unbeatable value, for all but the most demanding high performance application.