Shimano BB-R9100 Dura-Ace Threaded Bottom Bracket 68/70 mm shell width

Experience unparalleled performance with the Shimano BB-R9100 Dura-Ace Threaded Bottom Bracket, meticulously engineered to elevate your cycling experience.

Superior Seal Construction

Engineered with advanced seal construction, this bottom bracket ensures smoother rotation, enhancing the efficiency of your drivetrain for a seamless riding experience.

Minimized Weight

Featuring small ball bearings, the BB-R9100 Dura-Ace bottom bracket minimizes weight without compromising on durability or performance, allowing you to achieve optimal power transfer with every pedal stroke.

Threaded Design

Designed for frames with a shell width of 68/70 mm, the threaded bottom bracket offers easy installation and compatibility with a wide range of road bikes, providing a secure fit for your drivetrain components.

Precision Engineering

Crafted with precision engineering and premium materials, this bottom bracket delivers uncompromising performance and reliability, ensuring that you can push your limits with confidence mile after mile.

Upgrade to the Shimano BB-R9100 Dura-Ace Threaded Bottom Bracket and experience the pinnacle of cycling performance, where every ride becomes a testament to precision engineering and uncompromising quality.

Specifications

Specifications of Shimano BB-R9100 Dura-Ace Threaded Bottom Bracket

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

Technology

Technology of Shimano BB-R9100 Dura-Ace Threaded Bottom Bracket

Hollowtech II

• Providing the best balance of stiffness, strength, weight and rotating performance
  
• The concept of HOLLOWTECH II technology is focused on producing a superior crankset which will maximize a rider’s power transfer. The rigidity of the crankset ensures pedaling efficiency while its weight, a key element of the crankset, you want light, aids in cycling longer distances over which the rider needs to pedal more. Naturally, SHIMANO strove for the optimum balance between the conflicting needs of stiffness while producing a lightweight crank. HOLLOWTECH technology is an ultra-lightweight hollow crankarm created by SHIMANO with the company’s own proprietary forging technology that also maintains rigidity. The addition of HOLLOWTECH II technology integrates the bottom bracket axle with the right crankarm for more stiffness and a weight savings to achieve a high-dimensional balance. Its outboard bottom bracket bearing system provides better weight distribution and more pedaling stability, allowing for more efficient power transfer.
  
• The HOLLOWTECH II crankset has been developed by pursuing the optimum balance of stiffness & rotating performance in a lightweight and beautiful crankset design.
  
• High Precision Sealing- Moreover, HOLLOWTECH II crankset has a high-precision sealing in the bearing area to increase durability maintaining the excellent rotating performance for long periods.