Park Tool BBT9
- Bottom Bracket & Crank Arm Tool The BBT9
- Bottom Bracket & Crank Arm Tool is a highly durable metal tool designed to remove & install Shimano Hollow Tech II integrated Bottom Brackets & chain sets & offers 16 laser cut splines to securely engage the notches of the bottom bracket cups while the other end of the tool fits the 8 internal splines of the crank arm adjustment crank.