The park tool bbt 22 bottom bracket tool is a shop quality tool for installing and removing shimanoreg and isis drivetrade splined 20 tooth bottom bracket cups made from investment cast steel the bbt 22 utilizes a flat tooth profile to ensure maximum engagement with the bottom bracket cup can be used with a 38 drive torque wrench 38 ratchet driver 32mm wrench frw 1 freewheel remover wrench or 1 wrench park tool bbt 22 bottom bracket tool features the bbt 22 replac