BSA Bottom Bracket
Wolf Tooth BSA Bottom Brackets are engineered to be smooth, durable, lightweight, fast, and serviceable at home. Our ground-up design features custom bearings, seals, bushings, and cups, which eliminate creaking and balance best-in-class weather sealing with optimized bearing radial compression, alignment, and preload for low drag.
Wolf Tooth bottom brackets are machined at Wolf Tooth HQ in Minnesota, USA.
Best-In-Class Sealing, No Sacrifice In Speed
Thoughtfully engineered sealing is designed to balance low drag with superior performance in all conditions. The grouping of a spindle o-ring, seals on the bearing/bushing gutter, light inner and outer bearing race seals, shell o-rings, and a labyrinth-style end cap ensure your bottom bracket will spin smoothly no matter what conditions you ride in.
No Creaks
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. It's simple.
Lighter Than The Competition
It all adds up. Wolf Tooth Bottom Brackets are lighter than the competition and offer superior performance in all conditions. Win-win.
Features
- Compatible with 24, 29 DUB, and 30mm spindle cranksets
- 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
- Installation and removal with standard 44-16 (24mm) and 46-12 (29mm DUB, 30mm) spline tools
- Engineered, machined, and assembled at Wolf Tooth HQ in Minnesota, USA
- Replacement parts and service guides available via Wolf Tooth Right to Repair
- Lifetime warranty on bearings
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:
- 24mm: 83g
- 29mm: 87g
- 30mm: 82g
- (includes complete BB assembly without spacers)
- Material: 6061-T6 Aluminum, Glass-filled Nylon, NBR, EPDM, Urethane, Bearing ball material is AISI 52100 chrome bearing steel hardened to Rc 61-66, Bearing race material is AISI 52100 chrome bearing steel hardened to Rc 60-65
Compatability
- 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
