Shimano Ultegra Di2 FD-6870 Front Derailleur

A confession: We’ve always loved Shimano’s front derailleurs. They’ve always worked flawlessly and quietly. And then we rode Di2 bikes. The precision of the Di2 front derailleurs cannot be overstated. They work so phenomenally well, so precisely, and so quietly that we often forget they’re there. They auto-trim, eliminating chain rub, and they adjust themselves when they’re out of alignment. It’s among our favorite components, and the Ultegra 6870 is a fortunate beneficiary of this technology and design.

  • E-Tube compatible for programmability
  • Compatible with both standard and compact chainrings
  • Wires sold separately
  • Reviews
  • Q & A
Unanswered Question

can i use this with a 10 speed configuration or will it only work with an 11 speed configuration? Thanks

Packs a punch!

  • Familiarity: I've put it through the wringer

This derailleur is smaller that I thought it would be, and I was always jealous of my buddies, and competitors when I would hear the "zziipppp" of the shift from small to big ring. Now I get to hear it for myself and it is music to my ears. No longer do I need to dislocate my left wrist in shifting, now it is as eazy as clicking a button!

Robot Bike

  • Familiarity: I've put it through the wringer

Whiiiiiiir Zip Beep Boop Beep

1600 miles on this drivetrain and not a single issue or adjustment needed. Every shift has been flawless, and barring any unforeseen circumstances, like a crash or some good old fashioned garage or transportation mishap, I fully expect go 6000+ miles with no issues. The only drawback I can find, and this is totally a personal preference, but I sort of miss the mechanical drivetrain for no reason other than the simplicity of pushing a lever which pulls a cable which moves a derailleur. I would argue that the Di2 lacks tactile feedback when shifting, but that is just me nitpicking. I rode the battery until it completely died just to see what would happen. At about 1300 miles (this includes plenty of playing with the new group, shifting just to hear the sounds and show off the auto trim) The battery died on my 18 mile commute to work one morning, first the front derailleur refused to shift, after a few more shift button clicks it did shift down into the small ring, and I had about 30+ shifts of the rear derailleur before the system became unresponsive. So 1300 miles, I think it is safe to say a rider would need to be quite negligent to run out of power on accident.

If you want to incorporate the Bluetooth communication so you can firmware update and change shifting settings with your iPad, you will need an additional 150mm eTube wire, and the Di2 Wireless unit -

Di2 all the way

  • Familiarity: I've used it several times

It's hard to talk about one piece of an electronic drivetrain independent of the rest, but I shall endeavor to do so.

Ultegra is sweet spot for price and performance and the Di2 version is really no exception. The looks are polished if somewhat utilitarian - none of that Campy flair here. But the real concern here is shift quality and that's where this derailleur really shines.

Simply put, this system does not mis-shift. Ever. Even those tough jumps up to the big ring are handled quickly and efficiently. The responsiveness is confidence inspiring to say the least.

When Ultegra can be this good why bother with Dura-Ace?


  • Familiarity: I've put it through the wringer

In the word of front derailleurs, the Ultegra Di2 front derailleur is pretty remarkable -- precise, fast shifting every time. I've used it on gravel bikes, road bikes and aero bikes, in each application it has impressed.


Easy to use

  • Familiarity: I've put it through the wringer

Simple and esy to use. Very reliable


  • Familiarity: I've put it through the wringer

I purchased a bike with Ultegra Di2 about a year ago. It was my first foray into electronic shifting and it's just flat out reliable. The batteries last forever and you get quality dependable shifting. In the year that I've had it, I have had zero hickups.

Sticking with it!

  • Familiarity: I've put it through the wringer

Building a new bike is always exciting and it's always tempting to try new things. The drivetrain decision was particularly easy this time however, after my previous experience with Ultegra Di2. The light weight and sexy lines of the Dura Ace Di2 group are indeed tempting, but for the cost you can't go wrong with the Ultegra. I have had exactly :::zero::: issues with my previous group other than problems I have inflicted (read: derailleurs are not-crash-proof). This also makes the Ultegra a great option if you race, where close quarters and periodic pavement sampling are a fact of life.

best front mech ever

  • Familiarity: I've put it through the wringer

I've used the 10speed iteration for a long time and this is more of the same. It's great shifting every time. You have to love it.

Outstanding Technology and Operation

  • Familiarity: I've put it through the wringer

This front derailleur is part of a complete Ultegra Di2 system. It works excellent. Shifts from the small chain ring to the large one are so smooth it's like an automatic transmission in a car. Shifting down to the small chain ring is very smooth also. Follow the Shimano Dealers Manual (available on line at for install and set up. With a mid level of bicycle maint. experience it can be set up to operate smoothly and reliably.

I ordered the 6870 front derailleur knowing it was backordered, is there a time frame when it will be shipping out?

Hey Eric, Typically most back ordered items ship within 2 weeks of purchase day unless other wise specified. I will be in contact with you through email to give you the exact ETA of the items arrive.