Front side of Park Tool BBT-4 Bottom Bracket Tool, click to enlarge
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Item # BBT-4

/ Tools / Crank & Bottom Bracket

Bottom Bracket Tool — 6-Notch

The BBT-4 is made for the installation and removal of 6-notch SC-S and AC-H cartridge cups used on sealed cartridge bottom brackets. These bottom brackets have six notches around the outside of each cup. The handle of the BBT-4 is vinyl coated for comfort. The major diameter of the tool is nominally 44mm, and the minor diameter 38mm.

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BBT-4 Features

The BBT-4 is compatible with the following sealed cartridge bottom brackets:

  • Campagnolo®
    • Veloce™
    • Xenon™
    • Mirage™
    • Daytona™
    • Avanti™

Parts & Accessories


Bottom Bracket Tool Retaining System