Tool Park Tool BBT-RS Bottom Bracket Retaining System Black The right tool for the job This unique tool applies consistent pressure to your bottom bracket tool to allow for full engagement to prevent any slippage. 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. 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. Key Features Compatible with the following bottom bracket styles: threaded cup, thread-together, cartridge, cup-and-cone Compatible with Park Tool 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 Also compatible with any bottom bracket tool with a handle, any bottom bracket tool with external wrench flats M8 threaded rod and double-sided adapter nut with M12 and M15 threads, thread directly into any compatible cartridge bottom bracket Washer diameter: 57mm (2.25") Rod length: 175mm (6.9") Rod threading: M8 x 1.0 Adapter nut threading: M12 x 1.0 & M15 x 1.0 Specifications Part Number 5305319 Color Black Size One size Model Year 2026 Material Components Steel
