Promax | EX-1 External Bottom Bracket

Northwest BMX Verified independent store

→

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. Available in anodized red, blue, gold and black, to fit all 24-millimeter bottom bracket spindles and frames with 68 or 73 x BC1.37” bottom bracket shells. PX-BB13000EX: 103 grams/3.63 ounces Show more