Park Tool - BBT-RS Bottom Bracket Tool Retaining System

  • $86.31
  • Save $9.59
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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 nine 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:
  • The following models of Park Tool socket-style aluminum 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)
  • 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")

*Please note that our specifications may be impacted by running substitution changes, we highly recommend confirming the specifications of our products at the time of sale. *Recommended Retail Prices are subject to change without notice and may vary from store to store depending on freighting and assembly costs. Please read our Terms & Conditions

*Giant & Liv Bicycles are available for purchase online, but due to warranty regulations, must be shipped to qualified Giant dealers, as bicycles must be assembled by a qualified bike mechanic in an approved store - This is an international policy and usually will require an additional fee to build the bike. This will be confirmed by one of our online staff after purchase of the bike.

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