Our ISO thru rear hub is designed to deliver instant pedal engagement and unequalled smoothness by combining our patented RingDrive system and our legendary made-in-house bearings. Each ISO hub is exclusively machined in our Portland, OR factory and is fully serviceable with a complete selection of replacement parts.Key Features:Engineered, manufactured and assembled in Portland, Oregon USA.5-year built-to-last warranty.Patented RingDrive system with 72 simultaneously interfaced points of contact for unmatched hub engagement.Legendary made-in-house bearings.Easily serviceable and completely re-buildable with our Chris King Hub Service Tool.Responsibly lightweight.