Park Tool BBT-RS bottom bracket tool holding system

Bottom brackets are among the components with the highest torque specifications on a bicycle. Nevertheless, some bottom bracket shells have tool fittings that allow only a few millimeters of engagement, which can be problematic during disassembly or assembly. The solution: the Park Tool Bottom Bracket Tool Retaining System. The BBT-RS is used in conjunction with almost all Park Tool bottom bracket tools and uses a spring-based clamping system to exert even, adjustable pressure on the tool, ensuring full engagement with the tool fitting and preventing slippage.

The BBT-RS can be configured for use with most threaded and threadless bottom bracket standards. The BBT-RS features an M8 threaded rod and a double-sided adapter nut with M12 and M15 threads, allowing it to be screwed directly into any compatible cartridge bottom bracket. The M15 adapter can also be used to mount one of the nine aluminum bottom bracket tools from Park Tool, all of which have an integrated thread for use with the BBT-RS.

FEATURES:

 Compatible with the following bottom bracket types:

• Threaded shell 
• Screwed together 
• Cartridge 
• Shell and cone

Compatible with the following bottom bracket tools:

• BBT-27.3 
• BBT-35-12 
• BBT-35-36 
• BBT-47-12
• BBT-47-16 
• BBT-49.3 
• BBT-59.3
• BBT-69.3
• BBT-79.3 
• Bottom bracket tools with wrench and handle (e.g., Park Tool BBT-9, BBT-29, HCW-4) 
• Bottom bracket tools with external wrench flats (e.g., Park Tool BBT-19.2, BBT-22) 

Washer diameter: 57 mm (2.25")

Rod length: 175 mm (6.9")

Rod thread: M8 x 1.0

Adapter nut thread: M12 x 1.0 and M15 x 1.0