The Boost 6-bolt front hub is specifically designed for forks with a "Boost" disc spacing and "Boost" axles of 110 x 15 mm. Thanks to its larger diameter hub bearing, the Boost 6-bolt is designed to tackle rough terrain and demanding disciplines such as downhill and enduro. In the face of constantly evolving axle specifications, we are confident that the "Boost" disc spacing is here to stay.

Chris King Boost 6-bolt front hubs are designed as precision tools for mountain biking. We use one-piece axles to achieve a stiff hub and ultra-precise steering, transmitting the slightest variation in your handling to the terrain. To protect you from mud, water, and contaminants during your rides on the most demanding trails, Boost hubs are fitted with reinforced seals and circlips, offering superior protection and minimal friction.

Our bearings, available in steel and ceramic, feature thermally treated surgical steel races, simultaneously machined with identical wear tools to guarantee a perfect match between inner and outer races. The quality and speed of our bearings set us apart from the competition, and you will notice this on every ride. Chris King bearing races gain speed over time, and all our hubs and bearings are fully serviceable for years of intensive use.

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

King lifetime warranty

Flange fixing width

Compatible with Boost 110 x 15 mm axles

Legendary LD bearings, manufactured in-house

Easy maintenance with a 2.5 mm Allen key and a sharp tool or pocket knife

Fully serviceable with our universal hub maintenance tool

Lightweight and responsible design

Ceramic bearings available as an option

Available in 28 and 32 spoke versions

HUB SPECIFICATIONS

Axle width: 110 mm

Flange diameter (DS and NDS): 57.4 mm

Centre-to-flange distance (DS): 36.3 mm

Centre-to-flange distance (NDS): 27.3 mm