Shimano Dura-Ace BB-R9100 Hollowtech II Bottom Bracket

The Dura-Ace BB-R9100 rear derailleur by Shimano - Rider-tuned, high efficiency

The Shimano BB-R9100 bottom bracket is specially designed for Dura-Ace 11- and 12-speed cranks. It has small ball bearings to minimise weight and works with Hollowtech II technology for greater stability and rotational efficiency. The BB-R9100 is available in versions for BSA and for ITA threads.

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:

aluminium

Compatibility:

Recommended for:

• Dura-Ace FC-R9200, FC-R9200-P, FC-R9100, FC-R9100-P, FC-9000

Features:

• small ball bearings for low weight
• anodised bearing cups

Technology:

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

Models:

BSA:

Shell Width:

68 mm

Manufacturer Number:

I-BBR9100B

ITA:

Shell Width:

70 mm

Manufacturer Number:

I-BBR9100I

Contents:

• 1 x Shimano Dura-Ace BB-R9100 right bearing cup, with bearings
• 1 x Shimano Dura-Ace BB-R9100 left bearing cup, with bearings
• 1 x Shimano bottom bracket centre sleeve

Order Together:

• Bottom Bracket Tool TL-FC32
• Bottom Bracket Adapter Tool TL-FC24