Park Tool BBT-69.4 Bottom Bracket / Lockring Tool — 16-Notch - The Spoke Easy

A precision CNC-machined aluminum tool for the installation and removal of select components with 16-notch tool fittings, including bottom brackets, center lock disc brakes, and e-bike motor

Tools/Maintenance

A precision CNC-machined aluminum tool for the installation and removal of select components with 16-notch tool fittings, including bottom brackets,

BBT-69.4 Bottom Bracket / Lockring Tool — 16-Notch

Park Tool Bottom Bracket Tool 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 bottom bracket cups. The other end of the tool engages the 8 internal splines of the crank arm adjustment cap on Shimano Hollowtech II systems. The BBT-9 fits cups and lockrings with 16 external notches and an outside diameter of approximately 44mm.

Park Tool BBT-9 Bottom Bracket Tool

Trying to understand lock ring metrics to purchase an 'external bottom bracket tool' : r/bikewrench

Park Tool Bbt-35-12 Bottom Bracket Tool Cnc-machined Aluminum Tool : Target

Bottom Bracket Tool

Tools/Maintenance - Michaels Cycles

Bottom brackets have some of the highest torque specs of any component found on a bicycle. Despite this, some bottom bracket cups feature tool fittings that allow mere millimeters of engagement, which can be a problem when attempting removal or installation. Solution: the Park Tool Bottom Bracket Tool Retaining System.