Promax EX-1 External Sealed Bearings BSA 68/73mm Bottom Bracket for 24mm Cranks

Fits all 24-millimeter bottom bracket spindles and frames with 68 or 73 x BC1.37" bottom bracket shells 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 shellsItem SpecificationsBottom Bracket Shell I D