Bringing electronic wireless Di2 shifting to a new set of riders, this shift/braker lever combines industry-leading functionality with trickle-down technologies from the Dura-Ace and Ultegra series. After years of research and development, Shimano's 105 series now offers Di2 electronic shifting for the first time, bringing precise, intuitive gear changes to even more riders. Not only does it offer worry-free Di2 shifting in a compact shifter size, but it also features technologies such as Reach Adjust and customised button functions that allow you to dial in your ideal ergonomics. For those who have only experienced mechanical shifting and ergonomics, this model marks a new era of affordable performance.