The Chris King Boost 6-bolt rear hubs are designed for precision mountain bike use. Their rigid one-piece axles provide optimal stiffness, improving the performance of your suspension and the transfer of full power to the terrain. For a perfect seal against mud, water and contaminants during your rides on the roughest trails, the Boost 6-bolt hubs are equipped with reinforced bearing seals and a threaded sealing ring.

Our bearings, available in steel and ceramic, feature heat-treated surgical steel races machined simultaneously with identical wear tooling, ensuring a perfect match between inner and outer races. The quality and speed of our bearings set us apart from the competition and can be felt on every ride. Over time, Chris King bearing races become faster and all our hubs and bearings are fully serviceable for intensive use over many years.

Chris King's patented RingDrive system, with its 72 simultaneous engagement points, ensures optimal power transfer to the ground, unmatched engagement and the legendary sound characteristic of Chris King.

Designed, manufactured and assembled in Portland, Oregon, USA.

King lifetime warranty.

Angled flanges for improved wheel strength.

Patented RingDrive system with 72 simultaneous engagement points for unmatched hub engagement.

Legendary bearings manufactured in-house.

Available in 28 or 32-hole drilling.

Available with Micro Spline, HG or XD freehub body. Easily serviceable with a T10 Torx key and a pointed tool or pocket knife.

Fully serviceable with our universal hub maintenance tool.

Lightweight and responsible design.

Ceramic bearings available as an option.

Specially designed for the standard 148 mm x 12 mm "BOOST" axle.

HUB SPECIFICATIONS

Axle width: 148 mm

Flange diameter (drive side and non-drive side): 57.4 mm

Centre-to-flange distance (drive side): 23.8 mm

Centre-to-flange distance (non-drive side): 36.3 mm