Park Tool BBT-79.3 — 12-Notch Bottom Bracket Tool

The BBT-79.3 is a precision CNC-machined aluminum tool designed for installing and removing threaded bottom brackets with 12-notch tool fittings, including SRAM® BSA DUB®, Race Face® Cinch®, Rotor® BSA30, Zipp® Vuma™, and Hawk Racing™ BB3086™. Its anodized finish ensures easy identification, and the 3/8" drive is compatible with ratchets or torque wrenches for controlled, precise operation.

Engineered for full compatibility with the Park Tool BBT-RS Bottom Bracket Tool Retaining System (sold separately), the BBT-79.3 uses an adjustable spring-based tension system to maintain consistent engagement and prevent slippage during use.

Features

• Fits 12-notch threaded bottom bracket tool fittings

  • Major diameter (outside of notches): 45–47 mm

  • Minor diameter (inside of notches): 44 mm

• Compatible components include:

  • SRAM® BSA DUB®

  • Race Face® Cinch®

  • Rotor® BSA30

  • Zipp® Vuma™

  • Hawk Racing™ BB3086™

  • And other 12-notch bottom brackets

• Construction: CNC-machined aluminum with anodized finish

• Drive: 3/8" ratchet or torque wrench compatible

• BBT-RS Ready: Integrated threads for Park Tool BBT-RS Bottom Bracket Tool Retaining System

• Note: Not designed for impact drivers or other power tools