Shimano Ultegra SM-BBR60 Threaded Hollowtech II Bottom Bracket | The Bike Affair
Shimano Ultegra SM-BBR60 Threaded Hollowtech II Bottom Bracket | The Bike Affair

Shimano Ultegra SM-BBR60 Threaded Hollowtech II Bottom Bracket

ISMBBR60B

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Shimano Ultegra SM-BBR60 Threaded Hollowtech II Bottom Bracket

Shimano Ultegra - Bottom Bracket - Threaded - Hollowtech II - 68/70 mm shell width

Durability and Performance in a Threaded Design: Upgrade your bike's bottom bracket with the Shimano Ultegra SM-BBR60 Threaded Hollowtech II Bottom Bracket. Built with precision and durability in mind, this bottom bracket is designed for threaded shell widths of 68/70 mm and ensures a smooth and reliable ride.

Threaded Hollowtech II Design for Easy Installation: Featuring a threaded Hollowtech II design, the SM-BBR60 bottom bracket is easy to install and provides a secure and stable fit to your bike frame. Enjoy hassle-free setup and worry-free riding with this threaded bottom bracket.

Reliable Shimano Bearings and Seals: The Shimano Ultegra bottom bracket is equipped with reliable bearings and seals, providing long-lasting performance and smooth rotation. The high-quality components contribute to its durability and ensure a consistently smooth ride.

Long Service Life for Enduring Performance: With its robust construction and dependable components, the SM-BBR60 bottom bracket offers a long service life, reducing the need for frequent replacements. Enjoy enduring performance and extended use from this top-quality bottom bracket.

Compatible with Ultegra and Other Compatible Cranksets: Designed for use with Ultegra cranksets, the SM-BBR60 bottom bracket is also compatible with other compatible cranksets that utilize the Hollowtech II system. Enjoy versatility and flexibility when it comes to upgrading your bike's drivetrain.

Specifications

Specifications of Shimano Ultegra SM-BBR60 Threaded Hollowtech II Bottom Bracket

Model No SM-BBR60
Series Shimano 105 5800 Series
Average Weight 77
Hollowtech II bottom Bracket_Threaded Bottom Bracket Type Yes
Threaded Bottom Bracket Shell Width (mm)|68 Yes
Threaded Bottom Bracket Shell Width (mm)|70 Yes
Small Ball Bearing Yes
Technology

Technology of Shimano Ultegra SM-BBR60 Threaded Hollowtech II 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.

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. 


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