Shimano Bottom Bracket, Threaded BSA | Dura Ace BB-R9100, Hollowtech II

Dura-Ace defines Extreme Engineering at its peak. Each of the components magnifies the qualities of the others for an unparalleled level of performance, strait to the world races. It is optimizing input to maximize output. That's how it achieves supremacy, right to the BB-R9100 Bottom Bracket, too, at excellent prices.

Though designed for Dura Ace 11-speed cranks, it can also be used for other Shimano cranks to get an unfair advantage from the smoothest pedaling with the lowest price component upgrade. The miniature ball bearings minimize weight and use Hollowtech II technology for excellent stability and rotational efficiency. Available in versions for BSA and ITA threads.

BB-R9100

SHIMANO DURA-ACE - Bottom Bracket - Threaded - HOLLOWTECH II - 68/70 mm shell width

With an advanced seal construction for smoother rotation and miniature ball bearings to minimize weight, the SHIMANO DURA-ACE bottom bracket is offered in both press-fit and threaded options.

• Bottom bracket with miniature ball bearings for lightweight
• Advanced seal construction for smoother rotation

Specifications:

• Application: Road, Triathlon & Time Trial
• Series: Dura-Ace R9100
• Type: BSA, ITA
• Shell Width: 68 mm, 70 mm
• Axle Diameter: 24 mm (Hollowtech II)

Technical Information:

• Bearings: Steel
• Bottom Bracket Cup Material: Aluminum
• Compatibility Designed for Dura Ace FC-R9100, FC-R9100-P, FC-9000

Technology:

Hollowtech II
Shimano Hollowtech II is a crank bottom bracket system designed to achieve an ideal stiffness, weight, and rotational efficiency ratio. It is based on integrating the bottom bracket and the right crank arm and works with a 24 mm axle or bearing diameter, which has proven optimal stability. In many cases, the bearing cups are on the outside to distribute the load better. High-quality precision seals ensure long service life.

Product Specifications

• MODEL NO: BB-R9100
• SERIES: DURA-ACE R9100 Series
• Average weight: 65
• Threaded BB shell width_70mm: ✔
• HOLLOWTECH II bottom bracket_Threaded bottom bracket type: ✔
• A small ball bearing: ✔
• Threaded BB shell width_68mm: ✔
• Threaded bottom bracket shell width (mm)_68: ✔
• Threaded bottom bracket shell width (mm)_70: ✔

SKU#

• BSA: IBBR9100B (Shell Width: 68mm)
• ITA: IBBR9100I (Shell Width: 70mm)

*Note: Images are for representational purposes only. Actual size/packaging varies with product type/size.

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