Shimano XTR M9070 Di2 shifter actual weight

Earlier this week we brought you all the weights for the mechanical XTR M9000 components, and, as promised, here’s the Di2 M9070 bits on the scale.

Starting at the front, the shifter is about 63g (we’ll round up, but the decimals are on the scale). Only one shifter was weighed since they’re basically just mirror images of each other. That, and Fair Wheel Bikes was setting up a bike with sequential shifting, which only requires one shifter. So double the weight if you’re running a double.

Shimano XTR M9070 Di2 display actual weight

The display comes in at 30g even.

Shimano XTR M9070 Di2 battery actual weight

You can use the standard external e-Tube Di2 battery if you’d like, but the seatpost battery makes for a sleeker bike if you can do without a dropper post. Or, you can mount their cylindrical BTR2 battery on the water bottle cage mount along your seat- or downtube. Assuming you pick the internal, you’re looking at about 51g.

Shimano XTR M9070 Di2 front derailleur actual weight

The front derailleur is 128g.

It’s worth mentioning that most of what you’ll find written online (here and elsewhere) is calling out the entire XTR Di2 collection as a 9070 part number. Shimano, however, lists most of the items as M9050 except for the double-specific front derailleur, which gets the FD-M9070 moniker. All others are 9050 or something else (like BTR2 for the battery, etc.) if they’re likely to be compatible with other current or future products. As Jason from Fair Wheel Bikes put it:

“9070 is the double di2 front derailleur. Triple front Di2 is 9050. Most other pieces are 9050. Cranks and brakes are 9000 (race) and 9020 (trail). Cassette and chain are still 9000.”

Shimano XTR M9070 Di2 rear derailleur actual weight

The rear derailleur comes in just under 290g. Our Ultrega Di2 e-Tube wiring kit comes in at about 41g without the control box, so figure somewhere between 30 and 40g here, too, depending on setup.

Check out hands on photos and our ride review here, and the full technical breakdown of the drivetrain here, XTR Di2 parts here and brakes here. The rest of the component weights are here. Huge thanks to Jason at Fair Wheel Bikes for the assist!

19 COMMENTS

  1. What’s the cross-compatibility between this and road components?

    Could I attach the display box & get sequential-shifting? Does the rear-derailleur work with a road front & shifters?

  2. To get the sequential shifting you need both XTR derailleurs, control box and either XTR shifter or R600 satellite shifter. Other road components will not work, sorry 🙁

  3. @ Jeff Dubrule, you may want to try searching Lennard Zinn’s weekly tech advice column over on the Velonews website. He has had a few addressing road/mtb di2 compatibility, and actually had to do some follow ups with Shimano as there were some incorrect assumptions that had been made. I am not currently a candidate for this sort of setup, so I can’t claim I paid perfect attention to the articles, but from what I recall there was a problem trying to use MTB rear derailleurs with Road front derailleurs, which is a setup a lot of touring and tandem riders were interested in. Not 100% sure, but I think they said that, without a firmware update, that particular setup with Road shifters would only run as a 1x, or using a matching XTR front/rear derailleur, which would of course mean a mismatch in sizing with road rings.

    Again, verify for yourself, but I think that is relatively on target!

  4. Jeff, I’ve installed display unit with Road Di2. Then, it works well without “syncro-shift”. And these feature of compatibility is described in XTR manual that you are able to download from Shimano web site.

  5. @TheKaiser “problem trying to use MTB rear derailleurs with Road front derailleurs”

    Are they holding Shimano’s feet to the fire on this? I can’t stand when users cry foul when companies don’t accommodate their esoteric builds.

    It’s akin to yelling at BMW for not offering an adapter to hook up a winch to an M3.

  6. @’Merika

    Really? You hate it when we want items from the same company representing the same general idea to work together? How is your comparison even valid? You’re saying wanting to run a bigger rear cog with a cross setup is like that? I could see a lot of use in cross-compatibility. There’s nothing esoteric about that.

  7. @thekaiser @jeff dubrule, Looks like Alex at Norcalcycling has set up a Specialized Crux with 1×11 using XTR Di2 rear and ST-785 Hydraulic road levers. Check it out on Insta @norcalbikesport

  8. @’Merika

    They don’t have to accommodate them, just don’t deliberately gimp it. They all run on etube, we know for a fact that they’re capable of working together. Maybe I want to run drop bars and an xtr rear mech on my cross/adventure bike, the DA di2 and XTR di2 mechs are the same price, how is it affecting them in anyway?

    It’s akin to BMW putting a hitch plate on an M3 then putting a proprietary security bolt through it so no one is allowed to use it.

  9. @Frank: The “Z” button zeroes the readout, and that shifts the readout to account for the weight of anything on the scale not being measured. For a number of decades the human race has had the technology to tare scales.

  10. Now that I have a public forum I wiLL openly proclaim my love for shimano components!!! I LOVE
    YOU!! I LOVE YOU!!Don’t ever break my heart

  11. A potential reason for the non existent cross compatibility could be down to consumers expecting perfect shifting from there high end di2 group set, and shimano don’t want to say yes you can do this, because everyone will expect it to work perfectly, when in may not. It’s far better to just stop it happening, especially as they do an ultergra cx group set. You’d be pretty disappointed if you’d just shelled out for di2 and it doesn’t work perfectly because your trying to fit it with stuff it wasn’t designed to work with in the first place.
    Instead everyone should be moaning that they’ve stopped making ultergra 10spd di2 rear mechs, so if you rip off one in an accident you then have to shell out for 11spd front and back, and a compatible rear wheel.

  12. “…or using a matching XTR front/rear derailleur, which would of course mean a mismatch in sizing with road rings.”

    Exactly. The XTR FD is rated only for 34-38T big rings for the double and 40T for the triple. It seems a stretch to think it could work with a compact double…but who knows. MTB FD’s have worked on 34/50’s before. With the wide range cassette I don’t personally see the importance of the best front shifting possible, I’d settle for having it work.

    It seems particularly interesting to use the XTR rear with a road front for touring so I can’t imagine why Shimano wouldn’t do that. Does not seem hard or demanding of hardware.

  13. Apparently there is an issue as to whether Shimano did designed the XTR 11/40 to work with the electronic Di2 ROAD front derailleur/rear derailleur. I have a ti tandem that is convertible to a single (frame by True North Cycles) that has the XTR 11/40 cassette; a 50/32 with Lightning cranks; uses the electronic Di2 road front and rear derailleurs (rear has a K-edge long cage). My Toronto bike shop did something creative with the “B” screw (turned it upside down) on the rear derailleur and it shifts perfectly. So we have a 50/32 – 11/40; all road Di2 parts; we spin 13% grades. In summary the XTR incompatibility with Di2 electronic road components is now irrelevant.

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