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Shimano 2 Port Junction EW-JC302
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Shimano 2 Port Junction EW-JC302


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Mfg PartNum: IEWJC302
SALE: $20.89
MSRP: $21.99
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This item is currently not in stock but is available to purchase today as a backorder. It is expected 6/30/2024 and will be shipped when available.


A Crucial Connection In The Di2 Ecosystem

The Shimano 2 Port Junction EW-JC302 Junction allows you to connect two EW-SD300 electric wires to each other. The wires are fixed by a plug connection.


  • Series: EP8 EP800 Series
  • Weight: 5g
  • E-Tube ports: 2
  • E-Tube Port type: SD300
  • 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: IEWJC302 


Ordered by Most Relevant First
5 stars
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3 stars
2 stars
1 stars
Reviewed 4/15/2023
by RichBklyn
Cycling Enthusiast
New York City
Value Rating
Overall Rating
Handy for updating firmware on 12sp Di2 wireless shifters

I used this to connect my normally wireless shifters to the battery (seatpost) in order to update the L and R shifter firmware. A lot easier than pulling out the battery in the seatpost.

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Reviewed 3/6/2023
by Brian g
Overall Rating
Perfect for updating 12 speed shifters

To update 12 speed shifter software, disconnect wire from front derailleur, connect this junction to wire, then connect a second wire to the shifter. Use Shimano software. Boom.

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