Shimano Dura-Ace BB-R9100 ITA Bottom Bracket

The Shimano Dura-Ace BB-R9100 bottom bracket has Italian threading and fits a 70 mm shell. It is designed for those fitting Dura-Ace cranks to road, triathlon and time trial bikes.

• Italian threading (ITA): must be fitted to frames with a ITA threaded shell
• 70 mm shell: check that this matches your frame
• 24 mm Hollowtech II spindle, for compatible Dura-Ace cranks
• Steel bearings and aluminium cups
• Compatible with Dura-Ace FC-R9200, FC-R9100 and FC-9000 cranks

Technical specifications

• Shell width: 70 mm
• Threading: ITA, Italian
• Spindle diameter: 24 mm Hollowtech II
• Bearings: Steel
• Cups: Aluminium
• Recommended compatibility: Dura-Ace FC-R9200, FC-R9200-P, FC-R9100, FC-R9100-P, FC-9000
• Installation: Required for the FCR9100 crank
• Intended use: Road, triathlon and time trial
• Item code (SKU): BBR9100I

Founded in 1921 in Sakai, Japan, by Shozaburo Shimano, Shimano is still based in the same city today. For cyclists, it makes drivetrains, brakes, wheels, pedals and cycling shoes. Its history in bicycle components began with the production of freewheels in 1922.