Shimano Junction-A SM-EW90-B Dura Ace Di2, for TT-Handle Spec (E-Tube 5 Port, Charging Port)

Elevate your time trial performance with the Shimano Junction-A SM-EW90-B, a critical component of the Dura Ace Di2 electronic shifting system. Designed specifically for time trial handlebars, this sleek and aerodynamic junction box is an essential upgrade for any competitive cyclist. Product Features: Advanced Integration: Seamlessly compatible with Dura Ace Di2 electronic shifting systems, offering you unparalleled shifting speed and precision. Five E-Tube Ports: Connects up to five E-Tube wires, allowing for multiple shifters and accessory connections. Convenient Charging Port: Integrated charging port ensures easy access for battery charging, eliminating the need to dismantle your bike for power-ups. Aerodynamic Design: Compact and streamlined, designed to fit neatly within your TT handlebar setup for minimal wind resistance. Easy Setup and Diagnostics: Simplifies the installation process and provides easy access for system diagnostics and firmware updates. Robust Constructi