FRAME TYPE : This specific bottom bracket is made to be installed in a BB30/PF30 73mm MTN frame.
BEARINGS : 24mm Drive and a 24mm NonDrive Bearing. These are specifically made for use with Shimano Hollowtech II crank spindles.
TOOL : This specific Shimano BB30/PF30 bottom bracket requires two 16 notch traditional BB tools along with a press tool/drift for installation. Please read the instructions carefully for installation. Use any standard outboard cup BB tool with 16 external notches and a 44mm ID