The BBT-18 is a heavy duty, investment cast tool for installing and removing the following eight-notch bottom bracket cups: Shimano Octalink right cup with external notches, & ISIS Drive.

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Product Review

The BBT-18 is a heavy duty, investment cast tool for installing and removing the following eight-notch bottom bracket cups: Shimano Octalink right cup with external notches, & ISIS Drive.

  • The BBT-18 has 8 notches with an outside diameter of nominally 43.4mm.
  • The inside-to-inside width is approximately 38mm
  • Each notch is approximately 3.9mm wide.
  • The hole in the center of the casting is 22.5mm, and will not fit over the 30mm spindles.

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