SHIMANO SW-EW90-A

 

SHIMANO - Junction A - E-TUBE - Under Stem Mount - 3-Port

SHIMANO's SM-EW90-A 3-port Junction A mounts neatly to the bike stem and connects with E-TUBE wires from DI2 shifters and the downtube junction wire. The SM-EW90 junction box features an integrated battery level indicator, charging port, and gear index setup switch.