Shimano EW-JC302 SD300 2 Ports Junction

The Shimano EW-JC302 is a compact 2-port inline junction designed for SD300 E-Tube systems. It enables easy extension of wiring between Di2 components, offering a tidy and efficient solution when additional cable length is needed—especially in internally routed frames.

Designed for Next-Gen Di2 Systems: Fully compatible with Shimano’s SD300 wire standard, this junction is built for use in newer 12-speed Di2 setups. It ensures consistent signal transfer and power distribution, helping maintain the precision and reliability Shimano electronic drivetrains are known for.

Compact and Lightweight Build: Weighing just a few grams, the EW-JC302 is practically invisible once installed. Its slim, in-line design fits neatly within handlebars, downtubes, or junction boxes, making it perfect for clean, professional-grade builds where space and aesthetics matter.

Durable and Secure Connections: Equipped with two SD300 ports, the junction offers a snug and secure fit that resists water, dust and vibration. It’s engineered for long-term reliability on road, gravel, or MTB bikes—where exposure to the elements is part of the ride.

Beyond extending cable length, the EW-JC302 also plays a critical role in connecting wireless shifters or secondary components to the main system for firmware updates.

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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.