Fabricated from an advanced nitrile butadiene composite and featuring 3 lubrication pools to prevent heat, abrasion, torsional flex, and loss of lubricant. All chains are treated using RK exclusive HIT (heat induction transfer) process. Most chains are available in standard non-gold or distinctive gold color. As part of their continuing quality improvement program, the RK Chain Factory has made a running production upgrade to their best selling XSO 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. 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.
