ACS external 24mm sealed Bottom Bracket

The American Cycle Systems (ACS) Crossfire External Euro BB features CNC machined forged aluminum cups with oversized sealed bearings that ride on the outside of the BB shell for greater durability. Compatible with cranks such as Shimano, Rhythm, Sinz Elite XXX or other cranks that use a 24mm spindle size. 68/73mm BB width. (3.1 oz)