Park Tool Bottom Bracket Tool - Hollowtech II BBT-9
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The BBT-9 is used to remove and install external bearing crankset bottom brackets. 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:
Shimano® Hollowtech II®
Campagnolo® Ultra-Torque™ and Power Torque™
Phil Wood® outboard bearing
The BBT-9 also fits rotor disc lockrings which use 16 external notches.