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Shimano Di2 EW-WU111 In-Line Wireless Transmitter

Mfg PartNum:IEWWU111
$92.99
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The Shimano Di2 EW-WU111 In-Line Wireless Transmitter makes the electronic shifting system easier to use, adding Bluetooth connectivity in addition to the native ANT+ to feed data from derailleurs to a compatible phone, tablet, or cycling computer.

This little black box is compatible with Shimano's E-Tube Project for complete customization of shifting or last-minute firmware updating from a phone or tablet. Monitor battery levels, gearing, and other drivetrain metrics on the fly.

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

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Reviewed 11/26/2019
by Desert Dave
Cycling Enthusiast
South West
Value Rating
Overall Rating
Makes riding better!

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.

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Reviewed 5/17/2018
by BrooklynArchitect
Competitive Racer
Brooklyn, NY
Value Rating
Overall Rating
Nice to have iOS access to your Di2

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!

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Reviewed 11/26/2019
by Lalo Rivas
Competitive Racer
Monterrey Mexico
Overall Rating
1 of 1 customers found this review helpful.
Simply great!

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.

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Reviewed 5/12/2017
by DLinLV
Competitive Racer
Las Vegas
Overall Rating
Nice to have if you need to access DI2 on your phone

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.

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Reviewed 4/5/2019
by Anonymous
Overall Rating
1 of 1 customers found this review helpful.
Works perfect

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

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Reviewed 2/11/2019
by dat
Overall Rating
1 of 1 customers found this review helpful.
This is good to have on Di2 Shimano system

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.

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Reviewed 8/31/2017
by  Brian Kesselnan
Portland
Overall Rating
1 of 1 customers found this review helpful.
Cheapest way to get wireless capability for Di2

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.

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