The removal of traditional mechanical cables in favour of electrical wires not only eliminates poor shifting caused by contaminates, corrosion and stretching, but provides effortless gear shifts. The Shimano Dura-Ace Di2 5 Port TT Handlebar Junction Box connects the shifters via E-tube wires to the down tube junction wire.
This is a five port design with a battery level indicator feature so you know when your system needs charging up.
Please note: Stem mounting strap not included.
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