T47 External Bearing BB for installing a Shimano Hollowtech II cranks into a T47 68/73mm frames.
FRAME TYPE : This specific bottom bracket is made to be installed in a T47 E.B. 67/73mm frame.
BEARINGS : 24mm Drive and a 24mm NonDrive Bearing. These are specifically made for use with Shimano Hollowtech II crank spindles.
TOOL : Use any standard outboard cup BB tool with 16 external notches and a 44mm ID