Wolf Tooth MK0 Bottom Bracket - BSA-68/73-30 - Ceramic - shadow gray

MK0 Bottom Brackets take performance to another level with aggressive machining, custom ceramic bearings, and intricately designed race sealing built to Wolf Tooth's exacting specifications. This design saves you watts while proving durable enough for the most intense off-road racing, inclement conditions, and are fully serviceable.

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. 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.

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.

Installs With Standard Tools

No proprietary tools required. Wolf Tooth MK0 BSA Bottom Brackets use standard spline tools.

Designed and Machined In-House

Wolf Tooth MK0 Bottom Brackets are designed and engineered in-house from the ground up to be the best available option for any style of riding and every adventure.

100% USER SERVICEABLE

Replacing your bottom bracket bearings can be done at home with a few tools. We’ll even show you how to do it with video and text service guides.

Key Features:

• Premium ceramic bearings with low drag seals are built to our exacting specifications
• 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
• 6061-T6 Aluminum Bottom Bracket Cups
• POM Shell and Spindle Bushings
• NBR & Urethane seals
• Silicon Nitride bearing balls
• Bearing race: AISI 52100 chrome bearing steel hardened to Rc 60-65 with ACOSUR-ZNA corrosion resistant coating
• Designed, machined, and assembled at Wolf Tooth in Minnesota, USA

Included Spacers:

2x 0.5mm, 2x 1mm, 2mm, 3mm, 5mm spindle spacers

Installation:
Wolf Tooth BBS4612 or any standard 46mm 12 teeth spline bottom bracket tool