Promax Ex-1 Bottom Bracket


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
  • 103g



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