Product Details

Bottom brackets have some of the highest torque specs of any component found on a bicycle. Despite this, some bottom bracket cups feature tool fittings that allow mere millimeters of engagement, which can be a problem 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 features an M8 threaded rod and a double-sided adapter nut with M12 and M15 threads, allowing it to thread 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.

• 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-style bottom bracket tools with a 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)
• Tool specifications:
  • Rod length: 175 mm (6.9")
  • Rod threading: M8 x 1.0
  • Adapter nut threading: M12 x 1.0 & M15 x 1.0
  • Speed nut diameter: 38 mm (1.5")
  • Washer diameter: 57 mm (2.25")

About Park Tools
Park’s pledge for the future is simple: Build the best tools. Their commitment to that principle is stronger than ever. They build bicycle tools and maintenance equipment, it's all they do and they’re good at it. Supplying quality bike tools since 1963.