RK Racing Chain 530GXW-120 120-Links XW-Ring Chain with Connecting Link Sealed XW-ring chain features heat treated hi-carbon alloy steel components with seamless rollers and shouldered bushings XW-ring is made of an advanced Nitrile Butadiene composite featuring three contact lips and two convex outer stabilizers. This means three lubrication pools to protect against high speed abrasion, extreme heat build up, torsional flex and loss of lubricant XW-Ring chains are the best high-speed, extreme heat performance chains available today The XW-ring provides the user with a 50% longer wear life than basic o-ring chains 530GXW is rated for use with up to 1400cc street bikes and has a tensile strength rated at 10,000 foot lbs