Bottom Brackets

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  1. Promax EX-1 Alloy external Sealed Bottom Bracket 68/73mm Black
    $54.99 $37.27

    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 ultimate upgrade to the budget BBs sold with most crank sets.
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  2. Promax EX-1 Alloy external Sealed Bottom Bracket 68/73mm Gold
    $54.99 $39.92

    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 ultimate upgrade to the budget BBs sold with most crank sets.
    Learn More
  3. Promax EX-1 Alloy external Sealed Bottom Bracket 68/73mm Blue
    $54.99 $36.92

    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 ultimate upgrade to the budget BBs sold with most crank sets.
    Learn More

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