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Orders over $79.00 will receive free shipping. This is a residential delivery service, deliveries Monday through Friday from 9:00am to 8:00pm.
Learn MoreAs part of their continuing quality improvement program, the RK Chain Factory has made a running production upgrade to their best selling 520XSO chain. The 520XSO 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.
Product Variant | Manufacturer Part # |
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Gold / 120 Links RK 520 XSO RX-Ring Chain | GB520XSO-120 |