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Dura-Ace defines Extreme Engineering at its peak. Each of the components magnifies the qualities of the others for an unparalleled level of performance, strait to the world races. It is optimizing input to maximize output. That's how it achieves supremacy, right to the BB-R9100 Bottom Bracket, too, at excellent prices.
Though designed for Dura Ace 11-speed cranks, it can also be used for other Shimano cranks to get an unfair advantage from the smoothest pedaling with the lowest price component upgrade. The miniature ball bearings minimize weight and use Hollowtech II technology for excellent stability and rotational efficiency. Available in versions for BSA and ITA threads.
SHIMANO DURA-ACE - Bottom Bracket - Threaded - HOLLOWTECH II - 68/70 mm shell width
With an advanced seal construction for smoother rotation and miniature ball bearings to minimize weight, the SHIMANO DURA-ACE bottom bracket is offered in both press-fit and threaded options.
Shimano Hollowtech II is a crank bottom bracket system designed to achieve an ideal stiffness, weight, and rotational efficiency ratio. It is based on integrating the bottom bracket and the right crank arm and works with a 24 mm axle or bearing diameter, which has proven optimal stability. In many cases, the bearing cups are on the outside to distribute the load better. High-quality precision seals ensure long service life.
*Note: Images are for representational purposes only. Actual size/packaging varies with product type/size.
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When you buy a new bicycle in India or already riding a bicycle, you must have noted that Bike brands love this - Be it Trek, Specialized, Cannondale, Giant, Scott, Polygon, Merida, Marin, Bergamont, Btwin, Schwinn, Ridley - you will see all brands bicycles with an Altus component in use. At Cycling Boutique, the giant Shimano Gearing Systems and Components collection is in ready stock.
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