Shimano Dura-Ace BB-R9100 Bottom Bracket – Threaded, Hollowtech II, 68/70 mm Shell Width

The Shimano Dura-Ace BB-R9100 threaded bottom bracket is engineered for high-performance road cycling. Featuring lightweight, precision bearings and an advanced seal system, it delivers smooth rotation, increased durability, and optimal stiffness for efficient power transfer. Designed specifically for Dura-Ace R9100 cranks, it ensures a precise, stable connection between crankset and frame, providing a smoother pedal stroke even under demanding conditions.

Key Features:

• Hollowtech II Compatible: Designed for 24 mm integrated axles for high stiffness and low weight.

• Threaded BSA Design: Fits standard 68/70 mm road frames for secure installation.

• Durable Construction: Anodized aluminum bearing cups with carbon fiber reinforced plastic for enhanced longevity.

• Optimized Sealing System: Reduces friction and protects bearings from dirt and moisture.

• Enhanced Power Transfer: Firm connection between crank and bottom bracket for efficient pedaling.

Specifications:

• Shell Width: 68/70 mm

• Axle Diameter: 24 mm (Hollowtech II)

• Type: Threaded BSA (English)

• Material: Anodized aluminum, carbon fiber reinforced plastic

• Compatible Cranks: All Shimano Hollowtech II road cranksets

• Size: Standard