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Shimano 4 Port Junction EW-JC304
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4 Port Junction EW-JC304

Mfg PartNum:IEWJC304
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Backorder: This item is currently not in stock but is available to purchase today as a backorder. The expected availability date shown above is our best estimate as to when it will be shipped to you, but this date is subject to change based on our receipt of this item from its vendor. Shipping in the continental US is free for all backorder items (for international orders, our customer service team will contact you when the item is available to ship). Your credit card will not be charged until your item ships (Paypal requires payment up front, but you can cancel for full refund). Anytime prior to shipment, your backorder can be cancelled by contacting our customer service team.

An Integral Part In The Di2 Ecosystem

The Shimano 4 Port Junction EW-JC304 is used inside the bicycle frame to connect four EW-SD300 E-Tube wires to each other.


  • Component series: Shimano Di2
  • Model Number: EW-JC304
  • E-Tube ports: 4
  • E-Tube Port type: SD300
  • Weight: 5g
  • Type: Junction B

B-Stock - This product has one or more B-Stock units available. These units can be purchased at a discount (see option select). B-Stock units were returned from other customers and may have missing or damaged packaging materials. These units are otherwise as new. The full manufacturer warranty applies. Click Here for more information.


Mfg PartNum: IEWJC304