The Shimano SM-EW90-A 3-Port Junction A is a compact under-stem E-TUBE junction designed for Shimano DI2 electronic shifting systems. It provides a tidy and centralized connection point for DI2 shifters and the downtube junction wire, making electronic drivetrain management simple and organized.

Key Features:

• Model: SM-EW90-A

• Type: Junction A – E-TUBE

• Port Count: 3 Ports

• Mount: Under-stem mount

• Integrated battery level indicator

• Built-in charging port for DI2 battery

• Gear index setup switch for precise electronic tuning

• Compatible with Shimano DI2 systems

Ideal For:
Cyclists who want a streamlined cockpit and easy access to charge, monitor, and configure their DI2 electronic drivetrain with a minimal and neat setup.