Superlight straight pull Center Lock QR12 thru axle front hub.
24 holes oversized AL7075-T6 CNC machined body, center lock rotor mounting system licensed by Shimano and compatible with 15/20 mm thru axle only lockring (e.g. Shimano SM-HB20), Hi-performance sealed bearings with external preload system.
100% Made in Italy.
X-Hub Road SP Rear Center Lock X-12 XDR 24H Matte Black
Superlight Straight Pull Center Lock rear hub with 12 mm thru axle.
24 holes oversized Al7075-T6 CNC machined body and axle, center lock rotor mounting system licensed by Shimano and compatible with 15/20 mm thru axle only lockring (e.g. Shimano SM-HB20), Hi-performance sealed bearings with external preload system, AL7075-T6 free wheel SRAM XDR (eTap AXS 12s) and XD SRAM 11-12 speed compatible (Shimano 9-10-11s or Campagnolo 11-12s compatible in optional) with broached titanium ring.
(X-Hub SP Center Lock X-12 XDR 24) is a very lightweight and sophisticated product and it is intended for Cross Country or Marathon use.
This disc rotor represents an evolution of the X-Rotor SteelCarbon 2 model, which gained widespread acclaim among MTB and road enthusiasts since its debut in 2015. It is made for fixing on Center Lock hubs and ensures direct and efficient compatibility. Superlight semi-floating disc rotor with a steel braking surface, a carbon fiber inner body, an Al7075 Center Lock specific Adapter, a laser-engraved titanium protection plate, and fixing rivets.
The disc rotors now feature a profile with rounded CNC-machined edges, that increase safety and comply with the Union Cycliste Internationale (UCI) regulations. 1.8 mm thick special steel track has been redesigned to improve braking performance, enhance heat dissipation, and enable more even pad wear. The rivets and washers are made of Grade 5 titanium and represent a highly technical solution, in line with previous versions, ensuring high lightness, strength, and reliability.
It is provided with an extremely low profile lock-ring, which offers wide compatibility with hubs equipped with 12, 15, or 20 mm thru-axles.
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
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 is what sets 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
Wide flange placement
Fits 110x15mm Boost axles
Legendary made-in-house LD bearingsEasily serviceable with a 2.5mm hex and pick or pen knife
Completely re-buildable with our Universal Hub Service Tool
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
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
Hub Drilling: choose; 28 hole, or 32 hole
Rear Axle: 12x148mm "Boost" thru axle
Cassette/Driver: Shimano Micro Spline
Spoke Interface: J-Bend
Engineered, manufactured and assembled in Portland, Oregon USA
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
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.
Ceramic Bearings
Engineered, manufactured and assembled in Portland, Oregon USA
Legendary made-in-house bearings · King Lifetime Warranty
Patented RingDrive system with 45 simultaneously engaged points of contact for virtually drag free engagement
Available with Shiamano/Sram HG or Sram XDR driveshell
142mm x 12mm thru axle rear
Easily serviceable and completely re-buildable with our Universal or R45 Hub Service Tools
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
