Boost 6-Bolt Front (110 X 15mm)

The Boost 6-Bolt front is specifically for “Boost” disc spacing forks with 110x15mm "Boost" axles. Using the larger diameter hubshell bearing, the Boost 6-Bolt is designed to tackle rough terrain and aggressive riding, such as downhill and enduro. In an evolving landscape of axle specifications, we are confident that the “Boost” disc location is here to stay.

Chris King Boost 6-Bolt front hubs are designed as precision mountain tools. We use one-piece axles to provide a stiff hub with rail-accurate steering, transferring every minute adjustment you make to the trail. To thwart mud, water, and contaminants as you power through rough trails, Boost hubs have heavy-duty bearing seals and snaprings that provide superior protection with ultra-low drag.

Our bearings, available in steel and ceramic, have heat-treated, surgical-grade steel races that are machined simultaneously with tools of equal wear to ensure perfectly matched inner and outer races. The quality and speed of our bearings are what set us apart from the competition, and they are what you will feel and notice on every single ride. As Chris King bearing tracks burnish, they get faster with age, and all our hubs and bearings are fully serviceable for years upon years of demanding use.


• Engineered, manufactured and assembled in Portland, Oregon, USA
• King Lifetime Warranty
• Wide flange placement
• Fits 110x15mm Boost axles
• Legendary made-in-house LD bearings
• Easily serviceable with a 2.5mm hex and pick or pen knife
• Completely re-buildable with our Universal Hub Service Tool
• Responsibly lightweight 
• Ceramic bearing upgrade available
• Available in 28-hole and 32-hole spoke count

Hub Specifications

Axle Width: 110mm

Flange Diameter DS & NDS: 57.4mm

Center to Flange DS: 36.3mm

Center to Flange NDS: 27.3mm