Promax EX-1 Alloy external Sealed Bottom Bracket 68/73mm Black MFPN=ICNHG60111116QS non-slip cut

non-slip cut

Double: 412x40

}Cane Creek ZN40-Bearing 52mm Zinc Plated Each

Up to 100 hours of run time on 2 AAA batteries (included)

Promax EX-1 Alloy external Sealed Bottom Bracket 68/73mm Black MFPN=ICNHG60111116QS non-slip cutEX 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. Fits all 24 millimeter bottom bracket spindles and frames with 68 or 73 x BC1. 37 bottom bracket shells Bottom Bracket Shell I. D. 1. 37 BB Frame Interface English BB Shell Width (mm) 73