The park tool bbt 903 press fit bottom bracket bearing tool set is designed for installation and removal of bearings and bearing units used in bb90 bb92 shimanoreg press fit sramreg press fit gxpreg race facereg press fit and other press fit bottom bracket systems the bbt 903 includes a bearing removal tool and two bushings which are used in conjunction with a park tool bearing press to press the bearings into the bottom bracket shell park tool bbt 903 press fit bottom bracket