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. Di2 uses a fully removable individual cable system from the battery indicator junction box enabling fine tuning with the correct cable length to each component for easy and tidy fitment.
This junction A is required to connect the shifters via E-tube wires to the down tube junction wire
For either specific frame mount or handlebar end plug mount
Battery level indicator feature
E-tube EW-SD50 wires not included
Additional charging point when using internal battery
Gear index setup switch to allow fine tuning via shifter buttons
Reliable and secure water resistant connectors