Park Tool BBT-9 Bottom Bracket Wrench (External Bearing)

Remove and install external bearing crankset bottom brackets. The BBT-9 fits cups and lockrings with 16 external notches and an outside diameter of approximately 44mm.

Product details

1. One end securely engages the 16 notches of the bottom bracket cups
2. One end engages the 8 internal splines of the crank arm adjustment cap