SHIMANO SM-EW90-B E-TUBE DI2 JUNCTION-A 3 PORT

Top Features:

3 port design, one for down tube wire to bottom bracket junction, 2 for shifter connection.
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
Stem mounting strap included
Reliable and secure water resistant connectors

Product Data

Commuter: Yes
Touring: Yes
Cyclocross: Yes
Time Trial: Yes
Road: Yes
MTB: Yes

This junction A is required to connect the shifters via E-tube wires to the down tube junction wire.

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.