• Shimano - E-Tube Cockpit Junction Box - SM-EW90 A/B - One Color
    Shimano - E-Tube Cockpit Junction Box - SM-EW90 A/B - Detail
  • Shimano - E-Tube Cockpit Junction Box - SM-EW90 A/B - One Color
  • Shimano - E-Tube Cockpit Junction Box - SM-EW90 A/B - Detail
Shimano - E-Tube Cockpit Junction Box - SM-EW90 A/BView Larger Image

Shimano E-Tube Cockpit Junction Box - SM-EW90 A/B

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from $69.95 $125.99

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    • One Color, 3 PORT
      sale $69.95
    • One Color, 5 PORT
      sale $83.99
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    Tech Specs

    ⚠️ WARNING:
    This product can expose you to chemicals including DEHP, which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.
    Compatibility:
    Shimano Di2
    Recommended Use:
    road cycling
    Manufacturer Warranty:
    2 years

    Always at your fingertips.

    The Shimano E-Tube Cockpit Junction Box works with the Dura-Ace Di2 9070 groupset to enable supplemental shifting positions so that the ease of electronic shifting is always at your fingertips, no matter what hand position you favor.

    The E-Tube mounts just below your handlebars and functions as a junction box so that no additional wiring is needed to add a second set of shifters to your bars. Now you can keep your hands in the drops to maximize aerodynamics on long, flat stretches and up high for greater control. And for even more options, the E-Tube Cockpit Junction Box comes in two configurations: a three port and five port. To keep you running, both versions feature a charging port for the new internal Di2 battery.

    • A junction box that lets you expand shift switch placement
    • Mounts below the bar for easy installation and maintenance
    • Includes charging port for the SM-BTR2 Di2 battery
    • Available in three- and five-port versions
    • Compatible with Dura-Ace Di2 9070 drivetrains
    • Reviews
    • Q & A

    5/5

      Product performs as advertised with no problems whatsoever. I am new to DI2 and this in addition to the other components are easy to read up on and understand.

      Plugs, plugs, plugs

      • Familiarity: I've put it through the wringer

      A place for all of your Di2 plugs. Oh, and it's pretty key to making the system work.

      Works great

      • Familiarity: I've used it several times

      Great item that works as it should. Easy to use.

      Perfect Compliment to internal batteries

      • Familiarity: I've put it through the wringer

      Not only is this thing the "brain" of the system, it also serves and the charging port for the internal battery. I like how Shimano made this box sleek and not terrible to look at. Also allows for adjustment on the road also.

      It's a most

      • Familiarity: I've put it through the wringer

      Fits great on the bike, connects with no problems. Make sure you use the connecter tool so you don't mess up you cables. Again, its a most, since this is what you need to connect you levers and the rest of the cables to go to your di2 derailleurs and battery. The charging port very easy to access too.

      Critical Piece

      • Familiarity: I've put it through the wringer

      Things brings together your Di2 system. The 5-point option is great if you need to install remote shifting at the end of your aero bars. This also hosts your battery warning light. Plug it in once a month or so!

      Critical Piece

      More than just the junction box

      • Familiarity: I've put it through the wringer

      Keep in mind when considering the cost of such a small item that it not only gets the connections made, but also functions as a battery warning light, facilitates micro-adjusting the derailleur positions and is also where you plug in to charge up.

      great product

      • Familiarity: I've put it through the wringer

      self explanatory really. It does a great job and works far better than the old ultegra one.

      I have a few questions:
      1. Does it come with the attachment kit to the stem?
      2. What wire length do I need to connect to the shifters at a 400mm handlebar?
      Thanks
      Frank

      I've got the same question about the wire length. Same 400mm handlebar. Here's my measurement based on SM-EW67A wires:

      300mm could be too short for bigger hadlebars (or strange levers position). 350mm would be little loose. 300mm seems to be just right for me. Here's the picture of 300mm wire

      I've got the same question about the wire length. Same 400mm handlebar. Here's my measurement based on SM-EW67A wires:
300mm could be too short for bigger hadlebars (or strange levers position). 350mm would be little loose. 300mm seems to be just right for me. Here's the picture of 300mm wire

      Is this compatible with ultegra?

      Yes! The only group it won't work with is the DA7090 di2

      Do all the ports have to be filled for the junction box to work? Meaning could you run a standard shifting setup off the 5 port model having the option of adding sprint shifters later?

      Nope, You can buy the 5 port and only use 3. This will let you add remote shifters or other accessories down the road.

      Does the E-tube cockpit junction come with...

      Does the E-tube cockpit junction come with the Di2 wires for the shifters?

      Best Answer

      Hey Eric-



      The older junction boxes use to have E-tubes that were hardwired in. Now, this is only the 3/5 port junction box (the option is yours) with no included E-tubes,



      Let us know if you have any more questions on this!

      Shimano

      Di2 Reference Guide
      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 & Wire ConfigurationsBatteryBattery ChargerBattery MountJunction AJunction B

      External Battery

      with External Routing

      SM-BTR1

      SM-BCR1

      SM-BMR2

      SM-EW90 A/B 3/5 port

      SM-JC40

      External Battery

      with Internal Routing

      SM-BTR1

      SM-BCR1

      SM-BMR2

      SM-EW90 A/B 3/5 port

      SM-JC41

      Internal Battery

      with 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.

      Junctions: 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 ChartSML
      Down Tube Wire

      700mm

      750mm

      950mm

      Front Derailleur Wire

      300mm

      350mm

      400mm

      Rear Derailleur Wire

      500mm

      550mm

      600mm

      Battery Wire

      300mm

      350mm

      400mm

      Note: E-Tube Wire Length Suggestions are an approximation.
      E-Tube Wire Frame Size Guide

      S

      M

      L

      Frame Size 47 - 52cm 53 - 56cm 57cm+
      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.