Free Shipping on Order $75+ (Restrictions Apply)

Need help? Our support team is ready to assist you (¡Se habla español!)
Shimano EW-JC304 Di2 Junction Box - 4 Ports Use With EW-SD300
Shimano EW-JC304 Di2 Junction Box - 4 Ports Use With EW-SD300
Load image into Gallery viewer, Shimano EW-JC304 Di2 Junction Box - 4 Ports Use With EW-SD300
Load image into Gallery viewer, Shimano EW-JC304 Di2 Junction Box - 4 Ports Use With EW-SD300

SKU: CY8903

Shimano EW-JC304 Di2 Junction Box - 4 Ports Use With EW-SD300

Shimano
$34.00
$34.00 $34.00
Sale Sold out
/
Shipping calculated at checkout.
Expected Ship Date: Tue Jul 14
🚚 Free Shipping on Orders $75+
This is a pre order item. We will ship it when it comes in stock.
Shimano EW-JC304 Di2 Junction Box - 4 Ports Use With EW-SD300. Shimano Di2 Frame Junction Box
  • Frame Junction Box connects via SD50 E-tube wires to four different points: front derailleur rear derailleur cockpit junction box and battery mount
  • All Di2 components on the bicycle require the same firmware version. Using Di2 components with different firmware versions may cause malfunctions
  • Use Di2 system checker to update component firmware from http://e-tubeproject.shimano.com/
    • Ride Confidently. Shop NexGen.

    Ride Confidently. Shop NexGen.

    At NexGen, we don’t just sell bikes—we live the ride. What started as a passionate shop has grown into a full-service destination dedicated to helping riders get the most out of every mile.

    Every product we carry is chosen with performance, reliability, and real-world riding in mind.

    Premium Brands
    We carry trusted, high-performance products—no fillers.


    Fast, Reliable Shipping
    Get what you need quickly and ride sooner.


    Real Rider Support
    Expert help from people who actually ride, race, and explore.


    A Shop You Can Trust
    Real team. Real service. We stand behind every order.

    Learn More