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

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Item # SHI0650

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  • One Color, 3 PORT ($83.75)
  • One Color, 5 PORT ($89.95)
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Item # SHI0650

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.

  • Three- and five-port versions
  • Dura-Ace Di2 compatible

Tech Specs

Compatibility:
Shimano Di2
Recommended Use:
road cycling
Manufacturer Warranty:
2 years
Actual Weight:
One Color, 3 PORT: 10g; One Color, 5 PORT: 10g

Size chart

Shimano

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.

 

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 Chart
 SML
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
 SML
Frame Size  47-52cm 53-56cm   57+cm

Please Note:

E-Tube Wire length suggestions are an approximation. 

Reviews & Community

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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.

Avg. ride time: 5h 44m per week
  • Average ride time is based on Strava activity over the last 3 months. Give your reviews credibility by connecting your account.

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.

Avg. ride time: 12h 30m per week
  • Average ride time is based on Strava activity over the last 3 months. Give your reviews credibility by connecting your account.

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.

Avg. ride time: 19m per week
  • Average ride time is based on Strava activity over the last 3 months. Give your reviews credibility by connecting your account.

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
Avg. ride time: 1h 42m per week
  • Average ride time is based on Strava activity over the last 3 months. Give your reviews credibility by connecting your account.

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.

Avg. ride time: 2h 37m per week
  • Average ride time is based on Strava activity over the last 3 months. Give your reviews credibility by connecting your account.

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!