The Shimano Ultegra FC-R8000 11-speed crankset is characterized by its outstanding power transmission efficiency and can easily be used on racing bikes with disc brakes and 135 mm installation width. With a uniform bolt circle diameter of 110 mm, four different chainring combinations can be mounted on the asymmetrical 4-arm spider, resulting in a wide range of uses. As a Hollowtech crank with hollow-forged aluminum arms and with the Hollowtech II construction, the FC-R8000 offers an optimal ratio of stiffness to weight. The hollow outer chainring also helps. And last but not least, your racing bike is also visually enhanced by the Dura-Ace-like aesthetics of the Ultegra set.