Shimano Dura Ace 9070/Ultegra 6770 Di2 Wiring Junction

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5360068703
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Top Features:

  • For use with the NEW Dura Ace 9070 and Ultegra 6770 Di2 systems
  • SM-JC40 cable junction for external wire routing. To be mounted on bottom bracket cable guide threa
  • SM-JC41 cable junction for internal wire routing. To be positioned neatly inside frame tubing when

Product Data

  • Commuter: Yes
  • Touring: Yes
  • Cyclocross: Yes
  • Time Trial: Yes
  • Road: Yes

Description

The junction is required for connection of rear mech, front mech, battery, and cable to battery indicator junction box with reliable and secure water resistant connectors. Cables sold separately.

Returns

We will happily refund any item purchased on Wiggle if returned to us within 365 days; excluding Wiggle gift vouchers, nutrition and customised products, except when faulty.

Please note: Bikes and other bulky items cannot be returned using our local returns service (where applicable). Please contact us and we can arrange to collect these from you using our discounted courier rates. There is a fee for all collections, except for faulty products.

Returned goods must be unused and supplied with their original packaging, unless the goods are faulty. Wiggle will pay the return postage costs for any faulty items.
More information on Wiggle's return policy

Customer Reviews

Shimano Dura Ace 9070/Ultegra 6770 Di2 Wiring Junction is rated 4.7 out of 5 by 10.
Rated 4 out of 5 by from Very good Prompt delivery as always. And the product works flawlessly was cheaper then most other retailers, yet still a Little pricey but overall very good service.
Date published: 2018-01-14
Rated 4 out of 5 by from Life saver No internal routing on my bike so an essential product. Cheap and easy to fit!
Date published: 2017-04-29
Rated 5 out of 5 by from Does what it says on the box Bike back up and running. Brilliant back out on the road
Date published: 2017-02-26
Rated 5 out of 5 by from Made in Japan! Exceptional quality product just as you would expect it from one made in Japan. The JC41 is 4g only!
Date published: 2016-05-08
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Q & A

Surface area of external junction and waterproofness of internal junction

I wish to upgrade my Scott CR1 to use Ultegra Di2. This would require an external setup as there are no internal cable routings. However, the external junction box is designed to screws into the bottom of the BB shell. The Scott frame has no screw hole - the cable guide is held on by double sided sticky "tape" and the tension of the cables themselves. I have considered trying to also attach the external junction box similarly but am not sure whether there would be sufficient surface area for contact to stick? And therefore am wondering whether the internal junction box would adhere better. Which leads to the other question of whether the internal junction is any less waterproof than the external one?
Asked by: MrMD
I can confirm that the dimensions of the two junction boxes are as follows. Internal: 30x10x5mm External: 60x30x10mm The internal junction box is not suggested to be waterproof. I hope this helps.
Answered by: WiggleShack
Date published: 2013-10-23

Dura ace 9150 E-tube compatable ?

Is this junction box the correct one for the new dura ace 9150 e-tube?
Asked by: PurloinerPirate
According to the dura ace 9150 dealers manual this is the correct junction B box SM-JC41 internal SM-JC40 external
Answered by: PurloinerPirate
Date published: 2017-03-26

Can I use this junction box to connect an internal battery, display unit and rear mech on my 1x11 xtr di2 system

Asked by: Crawdoggy
I would have thought that this would work with your Di2 setup.
Answered by: WiggleBarney
Date published: 2015-07-20

ultegra 6870

will this be okay for use with the above version?
Asked by: jonnywipeout
This will work with your 6870 Di2 groupset.
Answered by: WiggleBarney
Date published: 2016-07-06

Number of ports

Hello, does the JC 41 have two or four ports please?
Asked by: MrMajic
I can confirm that this will have four ports. I hope this helps.
Answered by: wigglegrant
Date published: 2016-12-29
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