Park Tool BBT-9 Bottom Bracket / Crankarm Tool Hollowtech II – Silver

One end of the BBT-9 securely engages the 16 notches of the bottom bracket cups. The other end of the tool engages the 8 internal splines of the crank arm adjustment cap. The BBT-9 fits cups and lockrings with 16 external notches and an outside diameter of approximately 44mm.

 

The BBT-9 works with many external bearing crankset bottom brackets, including:

 

 

*The BBT-9 also fits rotor disc lockrings which use 16 external notches*