Shimano Ultegra Pressfit Bottom Bracket SM-BB72-41B

Reliable and Durable Performance with Shimano Ultegra Pressfit Bottom Bracket SM-BB72-41B

Shimano Ultegra - Bottom Bracket - Press Fit - Hollowtech II - 86.5 mm shell width

Upgrade your bike's bottom bracket with the Shimano Ultegra Pressfit Bottom Bracket SM-BB72-41B. Designed for Hollowtech II cranksets and featuring a press-fit installation, this bottom bracket ensures reliable and long-lasting performance for your rides.

Smooth and Reliable Operation: The Shimano Ultegra Pressfit Bottom Bracket SM-BB72-41B is equipped with high-quality Shimano bearings and seals, providing smooth and reliable operation. Experience reduced friction and efficient power transfer during pedaling.

Long Service Life: Built with durability in mind, the Ultegra bottom bracket offers a long service life, making it a reliable component for your bike. Enjoy consistent performance over countless miles, reducing the need for frequent replacements.

Press-Fit Installation for Easy Setup: The press-fit installation of the SM-BB72-41B bottom bracket simplifies the setup process. With proper tools and techniques, the installation becomes straightforward, allowing you to spend more time on the road.

Compatible with Hollowtech II Cranksets: Designed for Hollowtech II cranksets, the Ultegra bottom bracket ensures seamless compatibility and optimal performance. Pair it with your Ultegra crankset for a smooth and efficient drivetrain system.

86.5 mm Shell Width: The SM-BB72-41B bottom bracket has an 86.5 mm shell width, providing a precise fit for frames with this specification. Ensure a secure and stable bottom bracket assembly with the correct shell width.

Specifications

Specifications of Shimano Ultegra Pressfit Bottom Bracket SM-BB72-41B

Technologies

Technologies of Shimano Ultegra Pressfit Bottom Bracket SM-BB72-41B

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.

24mm Diameter Axle And Bearings: Why choose the 24mm axle and bearings for the Hollowtech II crankset?

The diameter of the Bottom Bracket axle and bearings was of primary importance for the development because the Bottom Bracket axle area is tied to such key elements as stiffness, strength, weight and rotating performance.

What’s important is the total balance of crankset: In addition, taking the crankset as a whole, the total balance of crankarm rigidity, axle stiffness, bearing position and others is essential.

Indeed, the crankset is designed by careful consideration of the total balance of those elements to prevent breakage.

Outboard Bearing: For most frames with 68mm Bottom Bracket shells, Hollowtech II with 24mm axle can set the bearing position outside of the frame to provide better weight distribution and more stability.

24mm Diameter Axle And Bearings Provide Optimum Balance For The Crankset: After studying all these problems thoroughly, we made the decision to adopt the 24mm diameter axle and bearings, which have the optimum balance, for the Hollowtech II crankset.

In addition, an examination of the total crankset, including the crankarm and gears, proves the optimum balance of rigidity, weight and rotating performance for the ultimate transfer of power to your bike. Hollowtech II is simply the most optimized crankset design on the market.

Press-Fit Bottom Bracket: 

To meet customer needs in the best possible way, Shimano has developed the press-fit bottom bracket, staying focused on our final goal: total performance in pedaling.

The bottom bracket axle is steadily supported by the wide placed bearings on the basis of Hollowtech II technologies providing highly-efficient power transfer.