With this model, Shimano and the cycling community celebrate the rebirth of the DI2 technology on their top of the range. And they do it at the highest level. Thanks to modern wireless control, to an impeccable functionality, to the 12 -speed transmission and the usual excellent construction quality, you can collect victories and seriously put competition in difficulty. The new XTR crack will also play a fundamental role. The new and very captivating design already reveals that it is a winning product. The cross country version shines for the low weight combined with high rigidity. This result was obtained thanks to the further development of the tested cold forging process of Shimano, which significantly optimizes the use of materials while ensuring high stability. In addition, the hard surface ensures excellent resistance to shocks and stone. The standard of the Hollowtech II pin and the practical fixing of the crown via a ring have been maintained. The q factor q of 168 mm allows a relaxed position of the legs and prevents the arming arms from touching the rear sheaths, even in the case of slightly wider rear triangles.