Shimano's Ultegra 6800 BBR60 Bottom Bracket was made with the same high level of precision that you've come to expect from the engineers at Shimano. The silky-smooth steel bearings, advanced sealing, and high manufacturing tolerances make the BBR60 the perfect bottom bracket choice.

• Cups: Aluminum
• Bearings: Steel
• Shell Type: External
• Shell Width: 68 mm
• Threading: English
• Weight: 77g