Shimano SM-EW90-F Junction Unit Dura-ace DI2 5-PORT T/trial

The Shimano SM-EW90-F 5-Port Junction Box is designed for Dura-Ace Di2 time-trial and triathlon setups. It connects up to five E-tube components for seamless electronic shifting integration.

Key Features

• 5-port junction for Di2 TT and triathlon systems.

• Central connection point for shifters and derailleurs.

• Compact, aerodynamic design.

• Reliable waterproof E-tube connection.

• Compatible with Dura-Ace Di2 systems.