Shimano SM-EW90-A 3 Port Di2 Junction Box is the versatile meeting point between the shifters and the rest of the Di2 Groupset.

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


Battery level indicator feature

Additional charging point when using internal battery

Gear index setup switch to allow fine tuning via shifter buttons

Reliable and secure water resistant connectors

Stem mounting strap included

E-tube EW-SD50 wires not included

Be The First To Review This Product!

Help other Bikebug Pty Ltd users shop smarter by writing reviews for products you have purchased.

Write a product review