BB-R9100 Dura-Ace Bottom Bracket

Product Information

The Shimano Dura-Ace BB-R9100 bottom bracket is a premium component engineered for peak cycling efficiency and durability. Utilizing Shimano's renowned Hollowtech II technology, it integrates the crank axle and right crank arm for superior stiffness and power transfer. Its advanced design minimizes rotational drag and weight, making every pedal stroke count.

This bottom bracket is built to perform in demanding road, triathlon, and time trial conditions, ensuring a long service life with consistent, smooth operation. Its refined sealing keeps out grit and water effectively, providing reliable performance even through challenging weather or regular bike washes.

Features

• Hollowtech II technology for optimal stiffness, weight, and rotational efficiency.
• Advanced seal construction reduces rotational drag by approximately 50%.
• Small-diameter steel ball bearings minimize weight while distributing load effectively.
• External cup design for improved stability and easier servicing.
• Anodized aluminum cups for durability and a sleek finish.

Specs

• Application: Road, Triathlon & Time Trial
• Type: BSA (English) or ITA (Italian) threaded
• Shell Width: 68 mm (BSA), 70 mm (ITA)
• Axle Diameter: 24 mm (Hollowtech II)
• Bearings: Steel
• Bottom Bracket Cup Material: Aluminum
• Weight (BSA): 65 g
• Compatibility: Dura-Ace FC-R9200, FC-R9200-P, FC-R9100, FC-R9100-P, FC-9000, and other Shimano 24mm thru-axle road cranks. Also compatible with FSA MegaExo and other 24mm spindle systems.