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Shimano Di2 D-Fly Wireless Transmitter Unit


Item # SHI006G

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  • Black, One Size ($72.99)
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Item # SHI006G

Televise your revolutions.

The electronic revolution is in full swing, and now it will be televised. Well, not televised exactly, but it will appear on your bike's computer screen courtesy of the Shimano Di2 D-Fly Wireless Transmitter Unit. Not even the Italians can keep up with Shimano's electronic innovations, and — while other companies are still preparing to release an electronic group or fine tune what they've already got out — the Japanese drivetrain experts continue to revolutionize cable-free setups.

This little guy is like a black box for your bike, feeding data via a proprietary ANT connection from your derailleurs to your computer so you can monitor drivetrain metrics like gearing and battery life. The latter is especially useful, as it's looking to be the most effective way the industry has come up with to ensure you won't unexpectedly run out of juice during the trip home. It also measures general riding metrics, so you're not sacrificing the functionality of a normal computer by adding drivetrain info to your cockpit. Your pedal revolutions will also be televised.

The Di2 D-Fly Wireless Transmitter Unit is compatible with Shimano's three E-tube Di2 groups: Dura-Ace 9070, Ultegra 6870, and the 10-speed Ultegra 6770. It transmits to Shimano's own PRO computer, as well as Garmin and Magellan computers. It's also an unobtrusive little device, measuring 38 x 25 x 12.5 millimeters with a claimed weight of less than five grams.

Tech Specs

yes, ANT
Mount Type:
Battery Type:
Manufacturer Warranty:
2 years
Actual Weight:
Black, One Size: 5g

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Avg. ride time: 4h 14m per week
  • Average ride time is based on Strava activity over the last 3 months. Give your reviews credibility by connecting your account.

Currently an 80% solution

  • Familiarity: I've used it several times

So I purchased this to wirelessly connect my Dura Ace Di2 system to the e-tube software using the new iPad app from Shimano. I received it and installed it easily (one wire needs to purchased separately) when I went to sync it to my iPad it would not connect. I knew the transmitter was working because my Wahoo Element paired with it right away. After researching the issue I found the "e-tube compatibility chart" on the Shimano website (http://e-tubeproject.shimano.com/pdf/en/HM-CC.3.0.0-01-EN.pdf) I discovered you have to have Di2 battery BT-DN110. The only place I could find the battery was eBay. I bought one for $122. from a vendor in Japan. After it arrives I will update and post some pics of adjusting the Di2 system wirelessly with an iPad.

Hey Matt,
Have you any update on your D fly fitting since you changed the battery? I purchased a unit myself and I'm having the same error - E-tube wont recognize the D-fly. I have ordered a battery from local shop today and I hope this sorts it.


Sadly after I installed the battery we have arrived at a 90% solution The data became available on my wahoo element (current gear / battery life) but the main reason I wanted the wireless connectivity the etube software still does not pair with my iPad. Sometime in the near future I am going to do the research to figure this out... When I do I'll post another update.

Unanswered Question

Does the d fly system link to ultegra electronic shifters ? What about changing screens from the shifters like the di2's can

Does the D-Fly come with all necessary wires?

Hi Benjamin! The D-Fly does not come with wires. You will need to purchase those separately.

Must Have Item for Di2 & Garmin Edge

  • Familiarity: I've put it through the wringer

I waited over a month, while this was backordered everywhere, and it was well worth the wait. I know it may seem like a silly item to some, but I love being able to see what gears I'm in on my bike at a glance on my Garmin Edge 510, especially at night. It's also nice knowing what my exact Di2 battery life remaining is at anytime.

Shimano Di2 Wireless D-Fly

    Nice addition to the Di2 setup, allows you to see what gear you're in without looking back at your cassette. It also monitors your battery level. I placed my D-Fly in the seat tube of my SL4 Specialized Roubaix Pro and my Garmin 510 picks up the signal just fine...not a necessity but a worthwhile purchase.

    Avg. ride time: 4h 40m per week
    • Average ride time is based on Strava activity over the last 3 months. Give your reviews credibility by connecting your account.

    Still waiting for this. Says Apr 1 but still nothing. Is this going to happen?? When will it ship?

    Hey Mike, I have replied to your message in an email.

    If there is anything else I can do for you, please feel free to contact me directly at bgehrig@backcountry.com or at 801-736-6396 ext 4823.

    What was the answer? I asked the same thing but never received a response.

    Just that there is high demand and CC are waiting for their allocation and then on to us

    Ordered this Feb 28. Originally due in on 01 Apr. Haven't seen any updates. When do you expect it will ship? Can someone at CC actually provide an answer?

    Will someone from Competitive Cyclist please answer this question?

    Avg. ride time: 57m per week
    • Average ride time is based on Strava activity over the last 3 months. Give your reviews credibility by connecting your account.

    What about the Garmin 810? Does this work with the 810?

    Shimano Di2 Integration

    Like the Edge 1000, the Edge 810 now integrates with Shimano Di2 shifting systems5 to display your current gear on the screen. We?ve also expanded the integration capabilities for those Edge users with compatible Shimano Dura Ace Di2 systems by allowing them to directly control their Edge from the small buttons inside the brake hoods.

    Does this work with the Garmin 510?

    Best Answer

    Yes, I have used this on both a Garmin 510 and a 1000. It works perfectly. I also tested control of the unit via the "hidden" buttons on Dura-Ace Di2 and can confirm that they work as well to control both Garmin 510 and 1000. I cannot confirm operation of any other models though.