The Shimano Di2 E-Tube SM-EW90 Di2 Junction Box Mount is a precision accessory designed to securely hold your Di2 E-Tube junction box in place for clean, reliable routing and easy access. Engineered to integrate with Shimano’s electronic shifting systems, this mount positions the junction box where it’s protected yet accessible for diagnostics, firmware updates, and tidy cable management — whether you’re in the workshop or on the go.

Built to Shimano’s exacting standards, the SM-EW90 mount offers a stable platform that keeps your Di2 junction box secure and reduces strain on the E-Tube wiring. Its design supports a clean installation, helping organize internal and external cable routes while minimizing unwanted movement or vibration that could compromise connections. The secure mounting also aids in protecting the junction box from impact and environmental exposure.

Installation is straightforward with compatible frame or component mounting points, making it a practical choice for riders building or servicing Di2 electronic drivetrains. By keeping the junction box neatly positioned and firmly fixed, this mount contributes to consistent Di2 performance and a professional, well-integrated component layout.