Shimano Di 2 Junction-A SM-EW90-A 3 Port The removal of traditional mechanical cables in favour of electrical wires not only eliminates poor shifting caused by contaminates, corrosion & stretching, but provides effortless gear shifts. This junction A is required to connect the shifters via E-tube wires to the down tube junction wire. 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 & secure water resistant connectors
- 3-port design, one for down tube wire to bottom bracket junction, two for shifter connection 5-port version also available for when using bar-end shifters