The PROMAX EX-1 External bottom bracket 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 BB's sold with most crank sets.Fits all 24-millimeter bottom bracket spindles and frames with 68 or 73 x BC1.37in bottom bracket shells.
Promax EX-1 Alloy External sealed Bottom Bracket
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Promax EX-1 Alloy External sealed Bottom Bracket / Black / 24mm
$61.00 USDRegular price