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The ST-R8150 electronic shift/brake levers from Shimano's Ultegra Di2 road bike groupset shift 12-speed or 2-speed by cable and brake mechanically. It scores with fast gear changes that are defined and intuitive thanks to the Shimano index shifting system. Cables are routed from the STIs first to a junction box and then to the battery, which in turn is connected to the rear derailleur and front derailleur. You can also connect the STIs to each other and run a cable from the right shifter to the battery. The ergonomics of the dual-control levers and the horns have been further optimised compared to previous models, and allow for a very comfortable grip. You can easily adjust the grip width with a flat head screwdriver. It is also possible to communicate with the third-party device via special buttons, mediated via the rear derailleur as a wireless unit. The brake levers are made of lightweight aluminium, the grip bodies of plastic, which saves additional weight.
|Handle bar compatibility||Drop down Handlebar|