Wolf Tooth

T47 External Bottom Bracket - For 24mm/Shimano Spindle

The Wolf Tooth T47 External Bottom Bracket for 24mm/Shimano spindles is built for riders who demand quiet performance, lasting durability, and smooth pedaling efficiency. Designed and machined in Minnesota, this bottom bracket combines precision engineering with premium materials to deliver reliable performance in all conditions.

Every detail of the Wolf Tooth T47 External Bottom Bracket is optimized to eliminate creaks, reduce drag, and extend bearing life. Its custom 52100 chrome steel bearings are hardened for superior wear resistance and finished with a ZNA corrosion-resistant coating that holds up to harsh environments. The combination of advanced sealing and a metal-free interface between the crank spindle and bearing races ensures the bottom bracket stays smooth and quiet over time.

An adjustable-width internal sleeve fits both 68mm and 73mm T47 shells, making installation straightforward and secure. Riders who want top-tier weather sealing and user-serviceable performance will appreciate this bottom bracket’s thoughtful design and long-term reliability.

• Precision T47 external bottom bracket for 24mm/Shimano spindle cranks
• Custom AlSi 52100 chrome steel bearings hardened for reduced friction and increased durability
• ZNA coating provides corrosion resistance equal to or better than stainless steel
• Multi-layer sealing system with o-rings, labyrinth end caps, and bearing seals keeps contaminants out
• Custom bushings eliminate metal-on-metal contact to prevent creaking and extend bearing life
• Adjustable-width internal sleeve fits 68mm–73mm T47 shells
• Designed, machined, and assembled in the USA