The EW-RS910 E-Tube Di2 Internal Junction-A is the key element for connecting your Shimano Di2 drivetrian. It mounts in either a bar end or, in the case of some frames, in purpose-built ports in order to connect Di2's disparate bits and provide a conveniently accessible charging port.
- The link to connect Di2 components
- Easily accessible charging port
- Shimano's Di2 is the peloton's most prominent drivetrain