Chris King Boost Rear Hub Activate The Boosters Chris King Boost rear hubs are designed as precision mountain tools. Featuring one-piece solid axles to provide a stiff hub that will help your suspension perform better and drive every watt of power into the dirt. To thwart mud, water, and contaminants as you power through rough trails, Boost hubs have heavy-duty bearing seals and a threaded drive shell seal ring. Features Canted flanges for stronger wheel builds Patented Ring Drive system with 72 simultaneously interfaced points of contact for unmatched hub engagement Easily serviceable with a T10 Torx and a pick or pen knife Engineered, manufactured, and assembled in Portland, Oregon, USA with King Lifetime Warranty SPECIFICATIONSHub Size12x148mm Spoke Interface J-Bend Hub Drilling28H, 32HBrake Type6-Bolt Cassette Compatibility XD, Microspline | Chris King | Boost Rear Hub 12 X 148Mm 6-Bolt Micro | Black | 32H