dvdslw

I've decided to upgrade my bike's 10 speed 6770 di2 to the new 11 speed Ultegra R8050 and it seems I have several options to consider from partial component swaps to a full replacement of everything.
My reason for the upgrade is based mostly on being bored with the bike and after looking around and test riding some new bikes, nothing I've ridden has wowed me enough to justify a purchase plus anything that comes with di2 is out of my budget right now.

On the cheap I could just buy the new R8050 front and rear derailleur, R8000 cassette, 11 speed chain, and use my current 6770 battery, 6770 shifters along with my 10 speed FSA SLK-Light crank which should all work together but not ideal.

For a bit more cash I could upgrade to the new internally mounted battery which would clean up things a bit, have bluetooth capability, but require me to purchase a new front junction box with charging port, two new etube shifter wires, and longer etube wire to connect the relocated battery.

Ultimately, replace everything listed above plus a new Ultegra R8000 crank and the R8050 shifters but in order to do everything I'd have to sell off the old stuff to help fund the new purchase and have no idea what to ask for a complete 6770 di2 groupset along with a set of Ultegra 6700 brakes to sweeten the deal? Also, what would the crank be worth its an FSA SLK-Light 175mm 53/39 BB30? Everthing is in above average shape with a few minor scuffs here and there but function as new. Just need a little help with the thought process an welcome any ideas I've overlooked, Thanks!

RPK79

You can use 10 speed shifters for 11 speed?

Personally, if I were going to upgrade a groupset, I would replace it all and sell the old group to recoup some of the cost.

dvdslw

Yes, the original Ultegra 10 speed 6770 shifters work with both Ultegra 6870 and Dura Ace 9070 11 speed components plus during a live broadcast on Youtube Shimano stated that the new derailleurs would be compatible with earlier "etube" shifters and batteries. The new R8050 Ultegra Di2 levers feature a programmable button at the top of each hood that can be assigned various functions such as cycling through menus on GPS computers, controlling lights, or even gear shifting itself which is something that interests me so I'm leaning towards a full replacement.

RPK79

You do realize that this upgrade won't make you any less bored with your bike, right?

dvdslw

Maybe, maybe not, I was riding pretty hard and heavy for about two years and was in the best shape of my life at 45 years old and then simply lost the desire to get out and ride which is taking its toll on my overall health and fitness. Its my hope that spending some money on the bike will reignite that spark to get me on the saddle in the morning. Might be all for nothing but hopefully it'll do the trick.

RPK79

Like buying jewelry to bring back the spark to a dying marriage.

dvdslw

Exactly, plus I get some new bike bling! What would you think a complete used di2 group would be worth? What should I list it for?

LAJ

The shifters won't bring a lot, because of the compatibility mentioned above. The real gold in you hand is the rear derailleur. Front 6770 can still be found, but the rear is tougher to find, and a clean functioning unit can be sold for a nice price.

dvdslw

The 6770 shifters are compatible with all variants of di2 except the original Dura Ace 7970 10 speed which used different wiring.

LAJ

Exactly, which means they aren't as much in demand as a rare 6770 RD.

dvdslw

Makes sense, totally misunderstood you at first.

RPK79

I think you missed my point, but it's your money.

TimothyH

The bluetooth unit is not required. I installed the WU111 and never used it, not once.

The USB battery charger does everything the Bluetooth unit does. If you don't plan on using a phone/tablet to configure your system and have no need to connect the system to a GPS head unit such as a Garmin then you can delete the bluetooth unit from the config and save yourself $80.

The system will function perfectly without it.


-Tim-

Doge

Edit @trailflow1 pointed out there were other 10 speed Di2 versions.
So the below information is not correct. I had version 1.

I think nothing electronic is compatible between the 10 Di2 and 11 speed. I have both.
Maybe the battery - don't know.
There is compatibility between the 11s

FlashBazbo

Except for original 10-speed Dura Ace (which is non-etube), everything else Di2 is cross-compatible -- 6770 10-speed / 6870 & 9070 11-speed. You just have to adjust the settings. Takes longer to plug in the computer than it does to make the changes.

Nachoman

I just sold a used 7970 Di2 10 speed groupset with everything except the crank for $350.00. I also upgraded and was looking to offset some (but not enough) expense.

Doge

So 10 speed and 6770 10 speed are different?

I thought there was just one version of Di2 10 speed.

trailflow1

The only exception is mixing and matching 6770 FD,RD's with 6870 & 9070 FD,RD's. With the latest firmware versions, this is prevented unless both FD and RD are matching.

If you still have the older firmware then they can be mixed.

Nachoman

I had the original non etube version and luckily my 7950 crankset was compatable with a deal i got on a upgrade to a 9070 Di2 groupset that was missing a new crank.

trailflow1

Yes. Dura ace 7970 DI2 used a different wiring system to 6770 Di2 which was first to use the e-tube format.

Doge

I will re-edit my post - I was wrong.

FlashBazbo

In the Beginning, Shimano made 10-speed Dura Ace Di2. (6770 10-speed is Ultegra and it is etube. It came later.) Original 10-speed Dura Ace Di2 worked flawlessly, but was a little heavier, the wires were bigger, and it wasn't as user-friendly for reprogramming. The original Dura Ace Di2 doesn't play well with anything else -- not even the wiring.

FlashBazbo

And of course, the really cool thing for gravel racers is that etube road shifters are compatible with etube MTB derailleurs (and vice versa) so long as you use both road derailleurs or both MTB derailleurs or just one derailleur.

Doge

It got handed down to my wife from kid. It still works great.

FlashBazbo

I was an early adopter. Loved it. (Especially in the face of all the urban and suburban legends about electronic shifting that populated this forum at the time.)

Back in those days, you had to stick the wires onto the outside of the frame tubes using long adhesive fairings. As long as you had a black frame and black fairings, it didn't look too bad. Any other color (other than white/white), and you ended up with an "inelegant" look, compared to today.