Park Tool Compact Bottom Bracket Tool BBT-18

. The BBT 32 is a heavy duty, investment cast tool for installing and removing the followingeight notch bottom bracket cupsFeatures Shimano ISIS Drive ISIS OverdriveNote The BBT 32 is an updated version of the current BBT 8. The outside diameter of the tool has been changed so it provides a universal fit on all Shimano and ISIS Drive eight notch cups. The BBT 32 has 8 notches with an outside diameter of nominally 43 4mm. The inside to inside width is approximately 38mm. Each notch is approximately 3.9mm wide The hole in the center of the casting is 22 5mm, and will not fit over the 30mm spindles Buy Park Tool Workshop Toolsfrom Chain Reaction Cycles, the World's Largest Online Bike Store.