With this model, Shimano and the cycling community celebrate the rebirth of the DA2 technology on their top of the range. And they do it at the highest level. Thanks to modern wireless control, impeccable functionality, to 12 -speed transmission and the usual excellent construction quality, you can switch from one victory to another and seriously test competition. The advantages of the electronic gearbox are evident: just press a button and the chain goes from one pign to another in a fraction of a second, regardless of the situation, without delays or efforts. The high quality XTR commands, equipped with Shimano rapid ES technology, are synonymous with precision. The well -defined pressure points of the rubberized buttons offer a constant feeling of control, while the ergonomic arrangement and the adjustment options ensure an always firm grip on the handlebar during the change. The rear derailler communicates wirelessly via Bluetooth®, thus eliminating the need for complex wiring and making the assembly on an extremely simple I-Spec attack. Of course, it is possible to customize the functions of the buttons through the Shimano E-Tube app. Whether it's single, multiple or inversion of the controls, the system adapts to your preferences. In addition, a small additional button can be used, for example, to control a cyclocomputer.