Chris King

Chris King ISO Boost Rear Hub

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Chris King hubs are known for innovative bearing and gearbox designs, exceptional durability, and for their brilliant jewel quality anodized colors and finishes.  The ISO B rear mountain hub uses wider spaced flanges, taking advantage of Boost geometry to increase wheel stiffness. 

Rear hubs employ King patented RingDrive gearboxes with 72 points of simultaneous engagement to get power to the ground quickly.  The RingDrive system is easily identified by its trademark “Angry Bee” sound.

Bearings are available in steel and ceramic for most models. Races are manufactured from heat-treated, surgical grade steel that are machined simultaneously, with tools of equal wear to ensure perfectly matched inner and outer races. As Chris King bearing races burnish they get faster with age. 

Hubs are fully serviceable for many years of demanding use. All Chris King products are 100% engineered, manufactured and assembled in Portland Oregon and carry a 5 year warranty.

Technical Information:

  • Hole Count: 28, 32,
  • Axles Standard: 148 x 12mm Boost only
  • Bearings: Chris King proprietary stainless steel or ceramic
  • Colors: King anodized and matte finishes
  • Drivetrain Compatibility: Shimano MTB, Shimano Microspline, SRAM XD 
  • Wheel building dimensions here
  • 5-year manufacturer warranty


Inventory Note: We stock a wide variety of Chris King hubs, however our inventory fluctuates daily. We may need to order hubs with an average lead time of 2-7 business days. Some hubs may take longer. If your order is time sensitive we encourage you to contact us for up to the minute product availability and shipping lead times.


  • Replacement bearings: Chris King proprietary stainless steel

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