Park Tool Bottom Bracket Tool - Hollowtech II - BBT-9 Audio Components Halo Sport Hat

Halo Sport Hat

Types: AERO for time trial bikes or ROUND for road bikes

10 inch hidden zipper

but slightly heavier

700 x 35/43c Schrader

Park Tool Bottom Bracket Tool - Hollowtech II - BBT-9 Audio Components Halo Sport HatThe BBT 9 is used to remove and install external bearing crankset bottom brackets. One end of the BBT 9 securely engages the 16 notches of the bottom bracket cups. The other end of the tool engages the 8 internal splines of the crank arm adjustment cap. The BBT 9 fits cups and lockrings with 16 external notches and an outside diameter of approximately 44mm. Made in USA. The BBT 9 works with many external bearing crankset bottom brackets, including: