These 6-bolt mountain sets feature the same precision manufacturing and robust feature set of past models.

Competitors use a more simple axle system with end caps, whereas Chris King uses one-piece solid axles without end caps which provides the stiffest interface with your frame. Delivering every possible watt from the drivetrain to dirt, you’ll no longer be an outsider wondering what all the fuss was about. Heavy duty bearing seals and precision manufactured parts will do their part to keep the mud and water from getting inside the hub shell and bearings, so they will keep running smooth for longer than competitors hubs.

Chris King’s unique RingDrive system in their rear hubs utilizes heat-treated stainless-steel drive and driven rings which handle massive torque loads (over 800 ft/lbs). Road hubs have 45 points of engagement, low drag, and a very solid feeling when you stomp on the pedals. The engagement mechanism lives inside the hub shell which allows it to have more contact area than would be possible with a traditional freehub design which lives outside of the hub shell.

Bearings are one of those items that are often overlooked when purchasing hubs. An inexpensive bearing works well on day one, so it can be an area where hub makers cut costs. With the harsh conditions encountered during cycling, bearings can get contaminated, wear out, and even if you can perform maintenance they never feel like new again. Chris King does things differently! They are the only hub manufacturer we know of that makes their own bearings in-house. Most bearings are generic and function with many different designs, whereas Chris King bearings are purpose built for best performance and longevity in their hubs exclusively. These hand assembled bearings are angular-contact, meaning they allow you to adjust the bearing preload with a simple collar. You don’t want to have your bearings too tight or too loose, so having the ability to adjust this over the life of your hubs is crucial. They are easily user-serviceable without special tools. Simply remove the snap ring and seal, clean, and re-grease and they will roll like new again!

Specifications and Wheel Building Information:

• Discipline: Enduro, Trail, E-bike, All Mountain, Cross Country
• Points of Engagement: 72 Tooth RingDrive
• Hub Shell Material: Aluminum (2024)
• Bearings: Steel (standard), Ceramic (useful for pro XC racers)
• Hub Flange: Bevelled, to reduce stress
• Min./Max. Spoke Tension: 110-130 kg/f
• Axle Width: 110mm (Front)
• Flange Diameter: 57.4mm (Same for all King CL/6-Bolt hubs on drive and non drive sides)
• Center to Flange Non Drive Side 110mm 6-bolt hub: 27.3mm
• Spoke Hole Diameter: 2.6mm (All King Hubs)

Why We Make This

It’s our job to make the best riding hubs in the industry, and 100mm x 12mm front hubs are THE standard for road disc and gravel bikes, so we poured our hearts and souls, not to mention an awful lot of engineering, into this hub. We’re proud of it.

Why You Want It

We already said it was the best, but everybody says that. Our R45 Centerlock™ hubs pair a lightweight hub body with our legendary, made-in-house bearings. The result rolls better, lasts longer, and looks way more handsome than anything else out there.

The stiffness of our one-piece axle translates to laser-precise bike handling. This hub also comes in one million (actually a handful) of cool colors.

Our bearings, both steel and ceramic, have heat-treated, surgical grade steel races that are machined simultaneously to ensure perfect matching. The quality and speed of our bearings is what you will feel (and hear) on every ride. As Chris King bearing tracks burnish they get actually get faster. A little bit of regular love (i.e. service) will keep this hub rolling for years upon years of demanding use.

• Engineered, manufactured, and assembled in Portland Oregon
• Legendary made-in-house bearings
• 100mm x 12mm thru axle
• Easily serviceable and completely re-buildable with our Universal or R45 Hub Service Tool
• Ceramic bearing upgrade available

Hub Specifications:

• Axle Width: 100mm
• Flange Diameter DS & NDS: 57.4mm
• Center to Flange DS: 30.6mm
• Center to Flange NDS: 22.3mm

Chris King Boost 6-Bolt 148x12 rear hubs are designed as precision mountain tools. 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 6-Bolt hubs have heavy-duty bearing seals, and a threaded driveshell seal ring

• Patented RingDrive with 72-points of simultaneous-engagement will get your power to the ground fast, provide unmatched engagement, and give you that legendary Chris King angry-bee sound
• Legendary made-in-house bearings
• Steel bearings have heat-treated, surgical grade steel races that are machined simultaneously, with tools of equal wear to ensure perfectly matched inner and outer races
• Quality and speed of bearings is what sets King apart from the competition and they are what you will feel and notice on every single ride
• As bearing tracks burnish they get faster with age and all King's hubs and bearings are fully serviceable for years upon years of demanding use
• Responsibly lightweight
• Canted flanges for stronger wheel builds
• Easily serviceable with a 2.5mm hex and pick or pen knife
• Completely re-buildable with ISO Hub Service Tool (sold separately)
• Brake/Compatibility: 6-Bolt disc
• Rear Axle: 12x148mm "Boost" thru axle
• Cassette/Driver: Sram XD
• Spoke Interface: J-Bend
• Engineered, manufactured and assembled in Portland, Oregon USA

Why We Make This 

It’s our job to make the best riding hubs in the industry, and 142mm x 12mm rear hubs are THE standard for road disc and gravel bikes, so we poured our hearts and souls, not to mention an awful lot of engineering, into this hub. We think it’s the best all-around disc hub on the market.

Why You Want It 

R45 Centerlock™ hubs combine a lightweight hub body, our legendary made-in-house bearings, and Centerlock compatibility. The result rolls better, lasts longer, sounds cooler, and looks way more handsome than anything else out there.

On top of all that, the 45 points of simultaneous engagement in this hub improve power transfer and traction thanks to our patented RingDrive™ system.

Our bearings, both steel and ceramic, have heat-treated, surgical grade steel races that are machined simultaneously to ensure perfect matching. The quality and speed of our bearings is what you will feel (and hear) on every ride. As Chris King bearing tracks burnish, they get actually get faster. A little bit of regular love (i.e. service) will keep this hub rolling for years upon years of demanding use.

All Chris King rear hubs come with that signature, angry-bee sound.

• Engineered, manufactured and assembled in Portland, Oregon USA
• Patented RingDrive™ system with 45 simultaneously engaged points of contact for virtually drag free engagement
• Available with Shimano/Sram HG or Sram XDR driveshell
• 42mm x 12mm thru axle rear
• Easily serviceable and completely re-buildable with our Universal or R45 Hub Service Tools
• Ceramic bearing upgrade available

HUB SPECIFICATIONS:

• Axle Width: 142mm
• Flange Diameter DS & NDS: 57.4mm
• Center to Flange DS: 18.7mm
• Center to Flange NDS: 33mm