Shimano Dura-Ace R9250 Di2 12 Speed Shifter SetThe Dura-Ace R9250 Di2 12 Speed Shifter Set is a pair of top-quality Dual Control brake/shift levers from Shimano. This lever set is the ideal for use with Shimano caliper rim brakes and Shimano 12-Speed Di2 electronic gear systems. Designed and engineered to ensure all-day riding comfort for long days in the saddle and exceptional gear shifting and outstanding stopping-power. The finest rim brake Dual Control Levers on the market, Dura-Ace ST-R9250 offer 12-speed shifting with refined ergonomics and is exceptionally lightweight. Dura-Ace ST-R9250 Dual Control Levers are the ultimate in reliable performance thanks to a Di2 electronic wired gear connection and lightweight rim brakes. Refined ergonomics and advanced materials show the racing pedigree of these levers. Shimano E-TubeE-Tube is Shimano’s “service” that uses websites or apps to maximize the enjoyment of riding a bicycle by connecting the riders, the bicycles and Shimano. Shimano’s genuine application E-Tube Project for Mobile allows you to customize your bike, update firmware, and maintain it by connecting it wirelessly to your bike. You can also get more detailed bike maintenance by connecting to your bike by wire with E-Tube Project via the Windows V4 application. Shimano DCL Dual Control LeverDCL stands for Dual Control Lever. It has brake and shifting functions in the system and enables easy operation. Ergonomic innovation is as critical to higher standard performance as the added gearing. The shift internals borrows the robustness from Shimano’s MTB technology and is so smooth and effortless that one finger shifts front and rear are possible. Indeed, shifting is the ultimate act of Shimano Total Integration and simply has to be experienced to be understood. Features: Quick and intuitive shifting Series: Dura-Ace R9200 Series Drivetrain: Shimano Di2 Electronic Speeds: 12-Speed Clearly defined click feeling with the ergonomic shift lever Better bike control and confidence in race conditions Hood shape and texture optimize grip and brake power transmission CFRP* lever CFRP* bracket *CFRP: Carbon fibre reinforced plasticsA 2-year warranty is offered with all Shimano products from Chain Reaction Cycles (3 years on Dura-Ace and XTR products).Buy Shimano Components from Chain Reaction Cycles, the World’s Largest Online Bike Store.