Park Tool BBT-18 Cartridge bearing wrench

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

• Shimano Octalink right bottom bracket shell with external notches
• Bontrager ISIS Drive™ bottom bracket shells
• Front chainring lock for Bosch Gen 3 and Gen 4 e-bike systems and Specialized Levo Brose e-bike systems

Features:

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