RK Racing Chain GB530XSOZ1-120 120-Links Gold X-Ring Chain with Connecting Link As part of their continuing quality improvement program, the RK Chain Factory has made a running production upgrade to their best selling 530XSO chain. The 530XSO chain features RK's proprietary "RX-Ring" seal design and is offered in 520, 525 and 530. 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 applications.High-performing, durable chain that will last five to eight times longer than your standard motorcycle chain.Constructed fr