Park Tool BBT-49.3 — 16-Notch Bottom Bracket Tool

The BBT-49.3 is a precision CNC-machined aluminium tool designed for the installation and removal of select 16-notch threaded bottom brackets, including Shimano® XTR® BB93, Dura-Ace® BB9000, and Token® bottom brackets. Anodized for easy identification, it features a 3/8" drive compatible design for use with ratchets or torque wrenches, providing controlled and accurate engagement.

For enhanced stability, the BBT-49.3 includes integrated threads compatible with the Park Tool BBT-RS Retaining System (sold separately), which uses adjustable spring-based tension to ensure consistent pressure and prevent tool slippage during installation or removal.

Features

• Fits 16-Notch Tool Fittings: Major diameter 39–40 mm, minor diameter 37.6 mm.

• Compatible Bottom Brackets:

  • Shimano® XTR® BB93

  • Shimano® Dura-Ace® BB9000 / BB-R9100

  • Token®

• E-Bike Chainring Lockrings: Compatible with Shimano® STEPS square spindle systems including E6000, E6002, E6050.

• Precision CNC-Machined Aluminium: Ensures accurate engagement without damaging threads.

• 3/8" Drive Compatible: Use with standard ratchets or torque wrenches for controlled torque.

• BBT-RS Retaining System Ready: Integrated threads allow full compatibility for secure, slip-free operation.

• Replacement Tool: Equivalent to Shimano® TL-FC38.

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