ACS Crossfire External Bottom Bracket - 63829-1000
ACS Crossfire External Bottom Bracket - 63829-1000, ACS Crossfire External Bottom Bracket Set Features: Forged and CNC-machined aluminum Precision sealed bearings for 2-pc cranks and 24mm spindles BSA 1.37"x24T for 68/73mm shells Specifications: BSA 1.37" x 24T Interface: 24mm spindle Width: 68 / 73mm shell