Promax EX-1 Bottom Bracket BSA Hollowtech II 68 mm, 73 mm Black

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.

• 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): 68
• BB Shell Width (mm): 73
• Weight: 102.9
• Spindle Interface Type: Shimano Hollowtech II
• Spindle Interface Type: FSA MegaExo
• Spindle Interface Type: FSA MegaExo Light
• Spindle Interface Type: RaceFace EXI
• Defined Color: Black