At Escapa, we have all the Shimano components and replacement parts you need for your electronic drivetrain. The Shimano Control Unit/Union -A SM-EW90-A 3-Port connects the cables from the shifters and bundles them into a single output cable. The three inputs are used to connect multiple STI levers to Union B. Since the brake/shift lever can be connected, each has 3 separate inputs; therefore, in addition to the total number of STI levers, there are 4 additional shift buttons. For example, a shift button can be installed on both the upper and lower junctions
- The SM-EW90A has 3 ports and connects the shifter to Junction B
At the same time, the Junction A unit cannot be connected to the Shimano SC-R770 computer via the ANT+ radio. This then provides an overview of important information, such as battery status and current gear, and can be paired with other ANT+ devices.
Compatibility: Dura-Ace Di2 9070 | Ultegra Di2 6770 | XTR Di2 M9050
Weight: 12g
Contents: 1x Distributor + strap/clip
Note: The model number SM-EW90B is listed as SM EW90F in many Shimano technical documents. However, the product has been revised and will now function as SM EW90B! Both devices are fully compatible with each other and with the Dura Ace Di2 9070 groupset components!
