One end securely engages the bracket cup's 16 notches while the other end 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 about 44mm. Also fits rotor disc lockrings that use 16 external notches.
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Remove and install external bearing crankset bottom brackets with ease using the two-sided BBT-9 Bottom Bracket Tool from Park Tool.
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