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Shimano
Di2 EW-WU111 In-Line Wireless Transmitter

Mfg PartNum:IEWWU111A
$92.99
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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.

B-Stock - This product has one or more B-Stock units available. These units can be purchased at a discount (see option select). B-Stock units were returned from other customers and may have missing or damaged packaging materials. These units are otherwise as new. The full manufacturer warranty applies. Click Here for more information.

 

Mfg PartNum: IEWWU111A 

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Perfect
by Brian
Bel Air, MD

It worked like a charm. I was initially scared of screwing something up with the install, but I was able to get Shimano on the phone and the guy walked me through it - brilliant!!

Reviewed 2/15/2021
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Simply great!
by Lalo Rivas
Competitive Racer
Monterrey Mexico
1 of 1 customers found this review helpful.

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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Makes riding better!
by Desert Dave
Cycling Enthusiast
South West
1 of 1 customers found this review helpful.

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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Wonderful
by Anonymous
USA
1 of 1 customers found this review helpful.

Easy to install. I watched a You Tube video over and over until I had the courage to connect it. Works perfectly. I like seeing the battery level % & what gear I'm in on my Garmin.

Reviewed 10/23/2020
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Functions as advertized but probably didn't need it
by dgmoe
Cycling Enthusiast
Edmonds, WA

Due to decreasing capacity, I had to replace my Di2 internal battery which required replacing the D-Fly transmitter for full functionality. Both had been upgraded to allow for Synchro and semi-Synchro shifting with the ability to program by smart phone. Turns out my riding style doesn't really mesh with synchronized shifting. Manual shifting is more intuitive for me and easier to adjust under changing conditions, such as starting a climb or cresting a climb, where uneven changes in grade require different adjustments. Bottom line is I may have not needed the upgraded D-Fly transmitter for the basic functions of the old unit, but I do like the in-line configuration as I have internalized the transmitter in my downtube and it makes for a cleaner wire in, wire out arrangement.

Reviewed 10/10/2020
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Easy to install and integration with my head unit totally worth it!
by Anonymous
Cycling Enthusiast
1 of 1 customers found this review helpful.

Seeing how much Di2 battery is left on my Garmin is great and very helpful to not run out, but I LOVE the integration with the Di2 shifters, specifically the secret Di2 buttons on the hoods. I set these up to change pages on my Garmin and makes it so much easier to swap through pages while riding without having to remove my hands from the hoods.

Reviewed 9/15/2020
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Needed Di2 System component for smart phone connection!
by John42
Cycling Enthusiast
Vancouver, WA

Shimano Di2 EW-WU111 In-Line Wireless Transmitter, Configuring the Di2 System, I didn't know all the components in the system; This allows user to transmit Di2 system diagnostics from smartphone! User can place this in the Seat Tube or perhaps in the handle bars; Used with Shimano App, "E-Tube", user can retrieve Di2 component updates and make adjustments through the App. As This is my 1st Di2 experience, it makes biking fun and continue to learn about the features!

Reviewed 9/14/2020
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It takes your Di2 forward to the 21st century. Bike manufacturers should add them to every build
by rc4theking
Cycling Enthusiast
Argyle, TX
1 of 1 customers found this review helpful.

I wish every Di2 build came with the D-fly unit. Being able to access your shifting, battery, and firmware updates through Bluetooth seems like table stakes to me. And, being able to scroll through your computer head unit screens, using the buttons under your Shimano Hoods, is another added plus.

Reviewed 10/27/2020
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Get the more out of your Di2
by 1TimeRunner
Madison, WI

Great integration with many Garmin head units that allow you to to change screens from the top of your shifters. This also allows you to wirelessly connect with Shimano�s e-tube to update firmware, configure shifting and do maintenance. You�ll love using this.

Reviewed 9/12/2020
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Nice to have if you need to access DI2 on your phone
by DLinLV
Competitive Racer
Las Vegas
1 of 1 customers found this review helpful.

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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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
1 of 1 customers found this review helpful.

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 firmware...you good to go.

Reviewed 2/11/2019
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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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Cheapest way to get wireless capability for Di2
by  Brian Kesselnan
Portland
1 of 1 customers found this review helpful.

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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