Shimano Ultegra BB72, BBR60 Hollowtech II Bottom Brackets

• Reduced size for light weight
• New seal construction for smoother rotation
• Requires TL-FC34 or included TL-FC24 adaptor for installation & removal
• Spindle Interface Type: Shimano Hollowtech II
• BB Shell Width (mm): 70
• Bottom Bracket Shell I.D.: 36
• BB/Frame Interface: Italian
• Weight: 77