Promax Ex-1 Alloy External Sealed BB 68/73mm
EX-1 External bottom brackets feature cold-forged and CNC-machined alloy cups, dual-labyrinth bearing covers and precision sealed bearings. They are the perfect match to Promax CF-2 and HF-2 cranks and the ultimate upgrade for all budget BBs you get with most crank sets. Available in anodized red, blue, gold and black, to fit all 24-millimeter crank spindles and frames with 68 or 73 bottom bracket shells.
- Fits 24mm spindles
- 68mm/73mm shell width