MarkZero Ceramic Bottom Brackets
MK0 Bottom Brackets take performance to another level with aggressive machining, custom ceramic bearings, and intricately designed race sealing built to our exacting specifications. This design saves you watts while proving durable enough for the most intense off-road racing, inclement conditions, and are fully serviceable.
MK0 components are proudly machined at Wolf Tooth HQ in Minnesota, USA.
No Compromise
Durability and ceramic bearings haven't always gone hand-in-hand. Where many ceramic bottom brackets are known for spinning with low friction, they're not known for making it through even a few months of riding in harsh conditions. Our MK0 ceramic bearings feature custom race sealing for flawless performance against the elements and endless speed.
Built To Endure
Custom bushings separate the bearing inner race and crank spindle to eliminate metal-on-metal contact, the leading cause of bottom bracket creaks. This bushing also helps enhance bearing longevity with an interface to the bearing gutter seal for maximum weatherproofing. No metal-on-metal contact, no creaks.
Mark Zero
Two years in the making, MK0 components were designed to balance extreme performance with stunning aesthetics. The collection is available in Shadow Gray to compliment any bike, and features extensive machining and exotic materials for weight reduction and enhanced performance.
Wicked Light
It all adds up. Aggressively machined to be lighter than the competition while offering superior speed and performance in all conditions. Win-win.
Features
- Premium ceramic bearings with low drag seals are built to our exacting specifications
- Adjustable-width sleeve fits 68mm - 73mm BSA bottom bracket shells
- Best-in-class weather sealing protects bearings from water, mud, and debris
- Custom polymer spindle bushings eliminate creaking and the unique MKØ version is modified for even lower seal drag
- Compatible with 24, 29 DUB, and 30mm spindle cranksets
- Installation and removal with standard 44-16 (24mm) and 46-12 (29mm DUB, 30mm) spline tools
- Designed, machined, and assembled at Wolf Tooth in Minnesota, USA
Bottom brackets ship with the following shell and spindle spacers:
- 2x 2.5mm shell spacers
- 24mm spindle - 2x 0.5mm, 2x 1mm, 2mm, 3mm, 5mm spindle spacers
- 29mm spindle - 2x 0.5mm, 2x 1mm, 3mm, 5mm, 7.5mm spindle spacers
- 30mm spindle - 2x 0.5mm, 2x 1mm, 2mm, 3mm, 5mm spindle spacers
Specifications
- Weights:
- 24 mm: 76 g
- 29 mm: 82 g
- 30 mm: 77 g
- (includes complete BB assembly without spacers)
- Material:
- Cups: 6061-T6 Aluminum
- Shell: POM
- Seals: NBR, Urethane
- Spindle bushings: POM
- Bearing ball: Silicon Nitride
- Bearing race: AISI 52100 chrome bearing steel hardened to Rc 60-65 with ACOSUR-ZNA corrosion resistant coating
- Cups: 6061-T6 Aluminum
Compatibility
- 68, 73, 83, and 100mm width BSA bottom bracket shells
- Included adjustable-width internal sleeve fits 68-73mm width BSA bottom bracket shells
- 83 and 100mm width internal sleeves are available for purchase as add-ons
