Chris King ISO Rear Boost 148 X 12 Thru XD 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 Image shows Shimano freehub - this hub comes with a SRAM XD freehub