BBT-18 - Bottom Bracket Tool 8-Tooth Splines: Shimano & Isis Sealed Cartridge

Park Tool BBT-18 Bottom Bracket Tool

The BBT-18 is a heavy duty, investment cast tool for installing and removing the following:

• Shimano® Octalink® right side bottom bracket cup with external notches

• Bontrager® ISIS Drive™ bottom bracket cups

• Front chainring lockring for Bosch® Gen 3 and Gen 4 e-bike systems and Specialized® Levo® Brose® e-bike systems

• 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 30mm spindles

• Can be used with a 36mm crow foot (such as the TWB-36) or open-ended wrench