![RK 520XSO High Performance RX-Ring Motorcycle Chain - 130 Link](http://roco4x4.com/cdn/shop/files/669a2f67-e654-41fc-b297-9dcceca462b1.261cd54e6a3f91deca89f48748832cd9_8b84e3a7-46e6-443b-95ac-e62ec626c6eb_700x700.jpg?v=1715353525)
![RK 520XSO High Performance RX-Ring Motorcycle Chain - 130 Link](http://roco4x4.com/cdn/shop/files/669a2f67-e654-41fc-b297-9dcceca462b1.261cd54e6a3f91deca89f48748832cd9_8b84e3a7-46e6-443b-95ac-e62ec626c6eb_700x700.jpg?v=1715353525)
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.