Shimano Di2 12-speed 2-port internal junction box EW-JC302

(29 reviews)

For extending a 12-speed Di2 cable

I choose my options

Transmission type

Ref : 1870516

€19.99

Price : €37.99

In stock

Quantity

Based on 29 reviews

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Boitier de connexion interne Shimano Di2 12v 2 ports EW-JC302

Shimano Di2 12-speed 2-port internal junction box EW-JC302

More details In stock

Shimano Di2 12-speed 2-port internal junction box EW-JC302

€19.99

Also available in store

Notre avis

Sylvain C.

Mechanical expert

The EW-JC302 connection box has the unique function of extending a 12-speed Di2 cable of the EW-SD300 type. It can be connected anywhere on the Shimano Di2 drivetrain.

Technical specifications

- 12-speed Di2 drivetrain
- Cable extension function
- Shimano part number EW-JC302
- 2 ports

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1★

2★

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4★

5★

9.8/10

Based on 29 reviews

Frédéric F.
Published Aug 15, 2026 at 08:53 pm (Order date: Aug 03, 2026)

5

Perfect (Translated review)
Jean-Jacques C.
Published Aug 14, 2026 at 09:11 pm (Order date: Aug 01, 2026)

5

compliant (Translated review)
Guillaume V.
Published Aug 02, 2026 at 05:41 pm (Order date: Jul 23, 2026)

5

Top (Translated review)
Dominique t.
Published Jul 25, 2026 at 06:29 pm (Order date: Jul 14, 2026)

5

Not served yet (Translated review)
Michel s.
Published Jul 02, 2026 at 09:16 pm (Order date: Jun 20, 2026)

5

in accordance with the order and connection box essential for extending shimano di2 electric wires (Translated review)
Sebastien N.
Published May 09, 2026 at 10:38 pm (Order date: Apr 26, 2026)

4

Good but a bit expensive (Translated review)
Régis F.
Published Apr 30, 2026 at 07:24 pm (Order date: Apr 18, 2026)

5

To connect to the Di2 cable with the appropriate tool (Translated review)
Sylvain M.
Published Feb 01, 2026 at 02:45 pm (Order date: Dec 14, 2025)

5

Top! (Translated review)
Silvère P.
Published Jan 08, 2026 at 05:16 pm (Order date: Dec 27, 2025)

5

Product conforms and works perfectly. (Translated review)
Alain H.
Published Jan 08, 2026 at 05:13 pm (Order date: Dec 28, 2025)

5

Very useful for updating Shimano Ultegra 12v levers (Translated review)