Park Tool BBT-79.3 Bottom Bracket Tool – 46mm

Precision-machined bottom bracket tool designed for reliable installation and removal of compatible external bottom bracket cups.

What Is It?

The Park Tool BBT-79.3 is a professional-quality bottom bracket socket designed to install and remove threaded bottom brackets featuring a 12-notch, 46mm tool fitting. Made from CNC-machined aluminium, it provides accurate engagement with compatible bottom bracket cups while reducing the risk of slipping or damaging the tool interface.

Key Features

• 12-notch design: Fits compatible 12-notch bottom bracket fittings.

• 46mm sizing: Designed for fittings with a 45–47mm outside diameter.

• CNC-machined aluminium: Provides precision and durability.

• 3/8-inch drive: Compatible with standard 3/8-inch ratchets and torque wrenches.

• BBT-RS compatible: Integrated threads allow use with Park Tool's BBT-RS retaining system.

• Professional workshop quality: Suitable for bicycle workshops and home mechanics.

Specifications

Benefits

• Provides secure engagement with compatible bottom bracket cups.

• Helps reduce slipping during installation and removal.

• Allows controlled tightening when used with a torque wrench.

• Durable construction for repeated workshop use.

• Compatible with several popular threaded bottom bracket standards.

Best Suited For

• Professional bicycle mechanics.

• Home bicycle maintenance enthusiasts.

• SRAM BSA DUB bottom brackets.

• Race Face Cinch bottom brackets.

• Rotor BSA30 and other compatible 12-notch systems.