![RK EXCEL Chain - GB520XSO Road Off-Road X'ring Chain Chain# GB520XSO](http://roco4x4.com/cdn/shop/files/4afc4988-d1cf-4022-a17b-ecb61033132a.94e8c1921c8e178c9428761e4a59ba75_64b4f753-3eff-4dc1-8c65-696cde0f7e66_700x700.jpg?v=1715349993)
![RK EXCEL Chain - GB520XSO Road Off-Road X'ring Chain Chain# GB520XSO](http://roco4x4.com/cdn/shop/files/4afc4988-d1cf-4022-a17b-ecb61033132a.94e8c1921c8e178c9428761e4a59ba75_64b4f753-3eff-4dc1-8c65-696cde0f7e66_700x700.jpg?v=1715349993)
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.