The Park Tool BBT-59.3 Bottom Bracket Tool, click to enlarge
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Item # BBT-59.3

/ Tools / Crank & Bottom Bracket

Bottom Bracket Tool — 16-Notch

A precision CNC-machined aluminum tool for the installation and removal of select threaded bottom brackets with 16-notch tool fittings, including Shimano® Ultegra® BBR60 and Deore XT® MT-800 bottom brackets. Manufactured in-house by Park Tool, anodized for easy identification and featuring a ratchet/torque wrench-compatible 3/8" drive.

The BBT-59.3 features integrated threads for full compatibility with the Park Tool BBT-RS Bottom Bracket Tool Retaining System (sold separately). The BBT-RS uses an adjustable spring-based tension system to apply consistent, adjustable pressure to the tool, ensuring full engagement with the tool fitting and preventing slippage.

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$26.95

BBT-59.3 Features

  • Fits 16-notch threaded bottom bracket tool fittings with a major diameter (outside of notches) of 41–42 mm and a minor diameter (inside of notches) of 39 mm, including:
    • Shimano® Ultegra® BBR60
    • Shimano® Deore XT® MT-800
  • 3/8" drive fitting

Product Fitment

Below is a filterable table of bottom bracket models the BBT-59.3 is compatible with. For a full list of tool compatibility, see our Bottom Bracket Tool Finder.

Shimano® Threaded Ultegra® BBR60 and Deore XT® MT800 Outboard

Parts & Accessories

BBT-RS

Bottom Bracket Tool Retaining System

BBT-59.3 Bottom Bracket Tool — 16-Notch 41 mm

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