Strength, long-wearing durability and lightweight performance define the legendary Chris King ISO XD Disc Rear Hub. Chris King's patented RingDrive engagement system provides instant, positive 72 teeth engagement for prompt acceleration, and provides the famed King "angry bee" freewheel sound. The made-in-house stainless steel bearings and the famous sealing system make this hub smooth, durable and long-lasting, backed by a 5-year warranty in all conditions. Compatible with all 6-bolt ISO disc rotors. Manufactured in Portland, Oregon USA.