Shimano Dura-Ace Di2 SM-EW90-B Junction-A 5-Port

The Shimano Dura-Ace Di2 SM-EW90-B Junction-A is a compact and essential component for advanced Di2 electronic shifting systems. Designed for time trial and triathlon handlebar setups, it ensures seamless connectivity and control for precise gear changes.

Efficient 5-Port Connectivity: The SM-EW90-B Junction-A features five ports, providing connectivity for Di2 shifters, accessory shifters, and the downtube junction wire. This setup ensures smooth integration across your Di2 system, delivering flawless shifting performance.

Integrated Battery Indicator and Charging Port: With a built-in battery level indicator, the junction box allows you to monitor battery status at a glance. The integrated charging port ensures easy and convenient recharging, keeping your electronic shifting system powered and ready for action.

Gear Index Setup Switch for Precision: The junction box includes a gear index setup switch, simplifying the process of fine-tuning your drivetrain. This feature ensures accurate gear indexing for optimal performance and reliability during every ride.

Neat Under-Stem Mount Design: The SM-EW90-B mounts neatly under the bike stem, maintaining a clean and aerodynamic cockpit. Its discreet design complements time trial and triathlon setups, ensuring both functionality and aesthetics.

Designed for Shimano’s top-tier Dura-Ace Di2 systems, this junction box offers seamless compatibility and intuitive operation. Its robust construction ensures durability, even in demanding conditions.

We ship across India. Shipping is free on orders above ₹2,000, and ₹99 is charged on orders below ₹2,000. Cash on Delivery is available for orders up to ₹20,000, with additional COD charges based on order value. Most orders are delivered within 3–6 working days, though delays may occasionally occur. Please note that most Shimano products may take longer to ship. View full shipping policy.

Returns can be initiated within 7 days of delivery. Items must be unused, in original condition, and returned with all tags and packaging intact. Returns are available only on select categories such as apparel, helmets, jerseys, gloves, and similar items. Wetsuits and products discounted above 5% are not eligible for return.

Returns are not accepted for compatibility-related issues unless the product description on our website was incorrect. Return shipping must be arranged by the customer, as pickup is not available.

For eligible returns, you can choose an exchange, store credit, or a monetary refund. Refunds are processed after deduction of applicable shipping and transaction charges. Order cancellations are only possible before the order is processed. View full Return & Refund Policy.