Shimano Ultegra Di2 Front Wire Harness
Shimano Ultegra Di2 Front Wire Harness. With plug in and pedal away simplicity, Shimano's Di2 digital electronic shifting system puts fast and precise gear changes at your fingertips. This easy-to-install front wire harness connects your left and right Ultegra Di2 Dual Control levers to each other and has a connection for an SD50 wire (sold separately, see 50-8599, 50-8600, 50-8601), which joins both levers to the junction box (also sold separately, see 50-8597). What you need to know: Ultegra Di2 Conversion
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