D.I.D Racing Chains

RK Chains 525X120 XSO

  • Sale
  • Regular price $134.28

RK Chains 525X120 XSO


As part of their continuing quality improvement program, the RK Chain Factory has made a running production upgrade to their best selling XSO chain line. The XSO chains features RK's proprietary "RX-Ring" seal design and is offered in 428, 520, 525 & 530. All versions are available in a variety of colors. Viewed in cross-section, the RK "RX-Ring" has two contact lips and one lubrication pool versus the single seal point/pool design of a regular o-ring chain. RK's XSO chains offer quality, performance and unbeatable value, for all but the most demanding high performance application.


  • Tensile Strength: 8,400 lbs
  • Max CC Rating: 900cc Street, 750cc Off-road
  • Master Link Included: Clip/Rivet type