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Di2 EW-WU111 In-Line Wireless Transmitter

Mfg PartNum:IEWWU111
  (7 customer reviews)
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Black Box.

Things just got easier with the Shimano Di2 EW-WU111 In-Line Wireless Transmitter, boosting the usability of your Di2 Drivetrain by adding Bluetooth connectivity. Customize your drivetrain or update your firmware while in the saddle with your compatible smartphone or tablet.

The tiny wireless transmitter plugs directly into your Shimano E-Tube Di2 wire, feeding the data through to your phone or tablet through Bluetooth, allowing you to make changes to your drivetrain, or monitor metrics like gearing or battery life. No longer do you need to assume an awkward position to get a rough estimate of your remaining battery life, then do some mental arithmetic to decide if you've got enough juice to get home.

The Shimano Di2 EW-WU111 In-Line Wireless Unit is compatible with Shimano's E-Tube Di2 systems.

Ordered by Most Relevant First
5 stars
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1 stars
Simply great!
by Lalo Rivas
Competitive Racer
Monterrey Mexico

This tiny device allows me to make sure I don't run out of battery in the middle of a ride. Also allows me to make changes on the Di2 configuration on the spot from my cell phone. Awesome.

Reviewed 11/26/2019
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Works perfect
by Anonymous
1 of 1 customers found this review helpful.

Had to use a Windows computer for the software to initialize it. Android and Mac would connect until after setup.

Reviewed 4/5/2019
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This is good to have on Di2 Shimano system
by dat

This device enable wireless feature on Di2 system, Di2 is wired FYI. With this device, system can communicate wirelessly for update firmware, customized button at the shifter, Garmin or alike devices. Almost plug n play, well just need to update good to go.

Reviewed 2/11/2019
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Nice to have if you need to access DI2 on your phone
by DLinLV
Competitive Racer
Las Vegas

I setup my DI2 on my PC, but you can do it on your phone now with this and the new battery. I noticed battery life has gone down a lot so I am now only planning to use this if I have any adjustments to do on the ride. Nice thing is if you have issues with the DI2 on a ride, you can access the system with your phone to make adjustments if needed, or get out of limp home mode. But, its not an essential piece of gear for DI2, in my view, so 4 stars.

Reviewed 5/12/2017
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Cheapest way to get wireless capability for Di2
by  Brian Kesselnan

Super small and light, works great inside my carbon frame. Not sure on metal frames. You will need the new battery and a short E-TUBE cable, but the wireless app is great as is the ability for the Di2 to talk to my Garmin.

Reviewed 8/31/2017
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Makes riding better!
by Desert Dave
Cycling Enthusiast
South West

The revisions of the E-Tube software are markedly improved over the initial versions. There are still some vague aspects to the software, but that is mostly the result of Japanese-English translation. I am able to update all firmware on all three of our Di2 bikes with the i-pad - no problem!

For me, this dongle is invaluable while riding. Using a cycling computer, It shows gear selection in front of you, so you don't have to take eyes off the road to see where you're at transmission wise. And, it shows a very helpful micro-adjustment scale when you put the Di2 into fine-tune mode while riding.

There is other detailed transmission information transmitted by this device to a phone or cycling computer while riding. With the right post-processing software you can know time in each gear combination, number of shifts during the ride.

Reviewed 11/26/2019
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Nice to have iOS access to your Di2
by BrooklynArchitect
Competitive Racer
Brooklyn, NY

It took some work to get everything set up (shoutout to my mechanic The Rover), but once he made the battery upgrade, updating the firmware was a snap.

Honestly, I was considering experimenting with the newer possible settings afforded the Di2 user for more intuitive shifting, but the instructions on the e-Tube project app are so opaque I don't even want to try it. So it's helpful for keeping the firmware up to date, though this doesn't really change my day to day riding experience, so it's a bit of an unnecessary toy!

Reviewed 5/17/2018
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