Shimano Dura Ace BB-R9100 Bottom Bracket 70mm Italian Thread

Product Description

Shimano Dura-Ace Performance

The Shimano Dura-Ace R9100 threaded bottom bracket is engineered for maximum efficiency, smooth rotation, and lightweight road performance. Designed specifically for Shimano HollowTech II road cranksets.

Advanced Bearing Performance

• Outboard bearing design for improved stiffness and efficiency
• New sealing system designed to reduce drag
• Smooth and consistent pedalling performance

Precision Construction

• BSA Italian threaded cups
• 36mm x 24 tpi threading
• 35mm cup diameter

Included Components

• Left and right hand cups
• Inner cover

Compatibility

• Compatible with Shimano HollowTech II road cranks
• Fits 70mm bottom bracket shells

Built for Road Racing

Ideal for performance-focused road bikes where low drag, smooth rotation, and reliable durability are essential.