Wolf Tooth BSA Bottom Bracket Info

Wolf Tooth BSA Bottom Bracket is engineered from the ground up for riders who demand smooth performance, long-term durability, and true serviceability. Designed, machined, and assembled in Minnesota, this threaded BSA bottom bracket eliminates common creaks while optimizing bearing alignment, preload, and radial compression for low-drag efficiency in real-world riding conditions.

Available for 24mm Shimano, 29mm DUB, and 30mm spindle cranksets, the Wolf Tooth BSA Bottom Bracket offers broad compatibility across road, gravel, and mountain platforms. An adjustable-width internal sleeve fits 68–73mm BSA shells, while optional sleeves are available for 83mm and 100mm shells. Precision-machined aluminum cups and custom polymer spindle bushings reduce metal-on-metal contact, a key factor in minimizing noise and long-term wear.

The bearings are a standout feature. Wolf Tooth uses hardened AISI 52100 chrome bearing steel for both balls and races, offering higher surface hardness than stainless for improved durability, reduced rolling resistance, and quieter operation. An ACOSUR ZNA coating provides corrosion resistance comparable to or exceeding stainless steel, even after extended saltwater exposure. Combined with an extensive multi-stage sealing system, this bottom bracket is built to perform in mud, rain, and demanding trail conditions.

Wolf Tooth BSA Bottom Bracket – Key Features

Spindle Compatibility: 24mm, 29mm DUB, and 30mm cranksets
Shell Compatibility: 68mm, 73mm, 83mm, and 100mm BSA threaded shells
Adjustable Sleeve: Included for 68–73mm shells
Sealing System: Best-in-class weather sealing against water, mud, and debris
Custom Bushings: Polymer spindle bushings reduce creaking and friction
Serviceability: Replacement parts and service guides available
Warranty: Lifetime warranty on bearings

Included Spacers

Shell Spacers: 2 x 2.5mm
24mm Spindle: 2 x 0.5mm, 2 x 1mm, 2mm, 3mm, 5mm spacers
29mm DUB Spindle: 2 x 0.5mm, 2 x 1mm, 3mm, 5mm, 7.5mm spacers
30mm Spindle: 2 x 0.5mm, 2 x 1mm, 2mm, 3mm, 5mm spacers

Technical Specifications

Weight (without spacers): 24mm – 83g | 29mm – 87g | 30mm – 82g
Cup Material: 6061-T6 aluminum
Internal Materials: Glass-filled nylon, NBR, EPDM, urethane seals
Bearing Balls: AISI 52100 chrome steel, hardened to Rc 61–66
Bearing Races: AISI 52100 chrome steel, hardened to Rc 60–65
Tool Interface: 44-16 spline (24mm) | 46-12 spline (29mm DUB, 30mm)

Installation

Installation and removal are performed using standard 44-16 (24mm) or 46-12 (29mm DUB and 30mm) spline bottom bracket tools. Proper shell preparation and light grease on threads are recommended for optimal performance and noise prevention.

Final Take

The Wolf Tooth BSA Bottom Bracket combines premium materials, precision machining, and advanced sealing into a threaded system built for longevity. Whether you're building a high-performance gravel bike, trail machine, or road setup, this BSA bottom bracket delivers smooth pedaling, reliable durability, and the long-term confidence of a fully serviceable design.