Shimano ISMJC41 internal Di2 cable junction box

(12 reviews)

Junction box in the frame

EAN : 4524667827467 | Ref : 1827300

€25.36

Price : €47.50

In stock

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Based on 12 reviews

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Shimano ISMJC41 internal Di2 cable junction box

More details In stock

Shimano ISMJC41 internal Di2 cable junction box

€25.36

Also available in store

Our opinion

An essential component for connecting all Shimano Di2 cables in the frame.

David G.

Former professional team mechanic

The Shimano Di2 ISMJC41 connection box allows you to connect the Di2 electrical cables of Ultegra and Dura Ace components. It is usually positioned near the bottom bracket, in the cross tube. Technical specifications:- Internal installation - 4x connection inputs - Shimano ISMJC41 reference

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1★

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5★

9.8/10

Based on 12 reviews

Dominique M.
Published Mar 30, 2026 at 10:32 pm (Order date: Mar 17, 2026)

5

Same (Translated review)
Angélique D.
Published May 27, 2022 at 08:32 pm

5

This box was installed in the seat post. Very discreet, perfect (Translated review)
Emmanuel B.
Published Sep 02, 2021 at 01:02 pm

5

Can be used to multiply connections on the VAE but also for diagnosing a VAE with DI2 (Translated review)
David F.
Published Aug 03, 2021 at 10:42 pm

5

Due to this compact design, this junction box can be placed inside the frame without difficulty. I recommend it! (Translated review)
Thierry f.
Published Jul 22, 2021 at 08:05 pm

5

No issues with this housing, perfect integration into the frame, I recommend (Translated review)
Thierry g.
Published Mar 09, 2021 at 05:04 pm

5

Perfect, integrates well into the frame, does the job (Translated review)
Thomas M.
Published Feb 17, 2021 at 05:44 pm

5

No issues, the junction box does its job well (Translated review)
Yannick P.
Published Jan 23, 2021 at 08:36 pm

4

Good but the whole Di2 setup remains laborious afterwards... (Translated review)
Paul V.
Published Aug 19, 2020 at 05:10 pm

5

Internal connection box for DI2, installs in the frame, quality connection (Translated review)
Eric F.
Published Nov 24, 2017 at 02:37 pm

5

no issues for the moment (Translated review)