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Shimano E-Tube Di2 Wire

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Item # SHI0398

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  • Black, 300mm ($18.69)
  • Black, 350mm ($18.69)
  • Black, 400mm ($18.69)
  • Black, 500mm ($16.09)
  • Black, 550mm ($19.54)
  • Black, 600mm ($16.09)
  • Black, 650mm ($18.62)
  • Black, 700mm ($18.62)
  • Black, 750mm ($18.62)
  • Black, 950mm ($18.71)
  • Black, 1000mm ($18.71)
  • Black, 1200mm ($18.71)
  • Black, 1400mm ($22.24)
  • Black, 1600mm ($25.24)
  • Black, 250mm ($18.69)
  • Black, 150mm ($18.69)
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Item # SHI0398


Look fast to go fast.

To outfit your Ultegra 6770, Ultegra 6870, or Dura-Ace 9070 Di2 bike, you will need five wire sections: front wire harness, down tube, front derailleur, rear derailleur, and battery. The front wire harness is sold separately, and is the only section that comes in just one length. Each of the remaining sections is available in three lengths--small, medium, and large. Refer to the size chart for available lengths, categorized by section.

One nice thing about the E-Tube system is that all the wires are the same, save for the length. This means that all the connections are identical, and it doesn't matter if your frame has internal or external routing.

Tech Specs

Compatible Components:
Shimano Ultegra Di2
Recommended Use:
ditching your mechanical tethers



Actual Weight

Actual weights are measured in-house by the Competitive Cyclist team.

Have questions? Chat with a Gearhead



Black, 300mm
Black, 350mm
Black, 400mm
Black, 500mm
Black, 550mm
Black, 600mm
Black, 650mm
Black, 700mm
Black, 750mm
Black, 950mm
Black, 1000mm
Black, 1200mm
Black, 1400mm
Black, 1600mm
Black, 250mm
Black, 150mm
Weight is for 950mm Di2 wire.

Size Chart


Di2 Reference Guide


Note: This reference is meant to be used as a guide for creating a Shimano Di2 drivetrain package. For further assistance please feel free to give us a call.


Battery and Wires:

Our Shimano Di2 packages are built for three standard configurations based on battery location and wire routing. First, you'll need to determine if your frame uses an internal or external battery mount, and whether the routing is either internal or external. Below is a guide for which battery, charger, mount, and junction boxes are required for your configuration.

Battery and Wire Configurations
 BatteryBattery ChargerBattery MountJunction AJunction B

External Battery

w/ External Routing

SM-BTR1 SM-BCR1 SM-BMR2 SM-EW90 A/B 3/5 port SM-JC40

External Battery

w/ Internal Routing

SM-BTR1 SM-BCR1 SM-BMR2 SM-EW90 A/B 3/5 port SM-JC41

Internal Battery

w/ Internal Routing

SM-BTR2 SM-BCR2   SM-EW90 A/B 3/5 port SM-JC41

Battery Mounts:

The SM-BMR2 battery mount is available in three configurations -- Long External, Short External, and Long Internal. Both Long versions are to be mounted using the bottle cage mounts, while the Short version is designed for Di2-specific frames with either a chainstay or down tube mounting location.



There are two junctions needed for completing your Di2 build -- A and B.  Junction A, SM-EW90, is located at the handlebars and available in both three- and five-port options. The three-port option is intended for standard shifting with a left and right hand shifter. If you have the intention of using Shimano's satellite sprint shifters, or a combination of time trial shifters and shifter/brake levers, the five-port junction box will be the necessary selection.

Depending on your frame specification, Junction B (SM-JC40 or SM-JC41) is located either internally or externally at the bottom bracket area. Accordingly, SM-JC41 is designed for frames with internal wire routing, while SM-JC40 is intended for external wiring options.


E-Tube Wires:

For your convenience, we've created wire packages for your Di2 build kit in the sizes Small, Medium, and Large. Below, you'll find which wire lengths are included in each kit. Additionally, we've recommended a kit size based on your frame size.

 E-Tube Wire Length Chart
Down Tube Wire 700mm 750mm 950mm
Front Derailleur Wire 300mm 350mm 400mm
Rear Derailleur Wire 500mm 550mm 600mm
Battery Wire 300mm 350mm 400mm


 E-Tube Wire Frame Size Guide
Frame Size  47-52cm 53-56cm   57+cm

Please Note:

E-Tube Wire length suggestions are an approximation. 

Reviews & Community


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They make things move

  • Familiarity: I've put it through the wringer

It's easy to install and it makes sure your derailleur shifts when you want it to.

Avg. ride time: 8h 36m per week
  • Average ride time is based on Strava activity over the last 3 months. Give your reviews credibility by connecting your account.

What you need

    This is the wire you need to install your Di2 group. It's a critical component of one of the best gruppos ever made.

    Straight Forward

    • Familiarity: I've put it through the wringer

    Shimano's e-tube wires work flawlessly. After a few Di2 set ups over the past couple years I have had zero issues.

    Avg. ride time: 18h 30m per week
    • Average ride time is based on Strava activity over the last 3 months. Give your reviews credibility by connecting your account.

    Durable wire!!

    • Familiarity: I've put it through the wringer

    It's the only wire you can get for connecting di2 components, but the quality is there, great and very durable.

    Shimano E-Tube Di2 Wire

    • Familiarity: I've put it through the wringer

    shockingly durable little wire that connects your components

    A little long for the D-Fly

    • Familiarity: I've used it once or twice and have initial impressions

    Purchased this to connect the D-Fly until to the rear derailleur. it is a little long. It would be great if CC stocked the 250 mm or 200 mm lengths

    they have 250, but not 200mm - bummer!

    E-Z does it.

      Electronic's a thing of beauty! You'll need a few of these to complete any Di2 setup. If you have any questions on what you need, please give our customer service "Gearhead" team a call!


      Avg. ride time: 4m per week
      • Average ride time is based on Strava activity over the last 3 months. Give your reviews credibility by connecting your account.

      no issues

      • Familiarity: I've put it through the wringer

      connections seem very secure and fits great inside my bike. I would certainly purchase this item again!

      About as easy as it gets

      • Familiarity: I've put it through the wringer

      Even though the E-Tube wiring has been around for a while, I still hear fears of use and concerns about durability. I've had the good fortune to build, test and unfortunately crash E-Tube equipped bikes for a couple years now and between the ease of setup and surprising durability of the system, I'm constantly impressed by how well it works. Wireless is the future, but until then we're in good hands!

      Unanswered Question

      Does it come with the wire holder? How many with each wire?

      Unanswered Question

      What is the length of The front wire harness ?

      any link to the product?


      etube di2 wire

      • Familiarity: I've used it several times

      i am amazed how robust this wire is and how well it fits neatly inside the frame. i was kind of hesitant about electrical wire on a road bike. but shimano did a great job of building very robust protective shield around the major wires for protection. it is not easy to cut one of these wire's unless you deliberately set out to do just that. Good product and it looks like it will last a long time.