Promax EX-1 Alloy External Sealed Bottom Bracket (Black) (BSA) (68/73mm) (24mm Spindle)

Promax 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 bottom brackets sold with most cranksets.

Specifications:
Frame Interface: BSA/English Threaded
Spindle Interface: 24mm (Shimano Hollowtech II, FSA MegaExo, Surly OD, FSA MegaExo Light, RaceFace EXI)
Bottom Bracket Shell ID: 1.37
Shell Width: 68mm, 73mm
Color: Black
Weight: 103g