Bottom Bracket Tool Retention System

Bottom brackets have some of the highest torque specifications of any bicycle component. Despite this, some bottom bracket cups feature tool fittings that allow for mere millimeters of engagement, which can be an issue when attempting removal or installation. Solution: the Park Tool Bottom Bracket Tool Retaining System. Used in conjunction with nearly any Park Tool bottom bracket tool, the BBT-RS uses a spring-based tension system to apply consistent, adjustable pressure to the tool, ensuring full engagement with the tool fitting and preventing slippage.

The BBT-RS can be configured for use with the vast majority of threaded and thread-together bottom bracket standards. The BBT-RS incorporates an M8 threaded rod and a double-sided adapter nut with M12 and M15 threads, allowing it to be threaded directly into any compatible cartridge bottom bracket. The M15 adapter can also be used to install any of Park Tool's current models of aluminum bottom bracket tools, all of which feature integrated threading for use with the BBT-RS.

SEE THE PRODUCT IN ACTION

COMPATIBILITY

Compatible with the following bottom bracket styles:

• Threaded cup
• Thread-together
• Cartridge
• Cup-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-69.4
• BBT-79.3
• Wrench-type bottom bracket tools with handles (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)

SPECIFICATIONS

• Rod length: 175 mm (6.9")
• Rod threading: M8 x 1.0
• Adapter nut threading: M12 x 1.0 & M15 x 1.0
• Nut diameter: 38 mm (1.5")
• Washer diameter: 57 mm (2.25")