SM-EW90-A
Brand: Shimano
External junction A of the Shimano Di2 11-speed system, mounted under the stem. It gathers both levers and the wire down to junction B on three E-Tube SD50 ports, plus a dedicated charging port. Its button gives access to battery level, gear position, adjust mode and the E-TUBE PROJECT connection. Shimano quotes 10 g. The SM-EW90-B is the five-port variant.
| Type | Electronic shifting accessory |
|---|---|
| Model years | since 2013 |