- News
- Reviews
- Bikes
- Accessories
- Accessories - misc
- Computer mounts
- Bags
- Bar ends
- Bike bags & cases
- Bottle cages
- Bottles
- Cameras
- Car racks
- Child seats
- Computers
- Glasses
- GPS units
- Helmets
- Lights - front
- Lights - rear
- Lights - sets
- Locks
- Mirrors
- Mudguards
- Racks
- Pumps & CO2 inflators
- Puncture kits
- Reflectives
- Smart watches
- Stands and racks
- Trailers
- Clothing
- Components
- Bar tape & grips
- Bottom brackets
- Brake & gear cables
- Brake & STI levers
- Brake pads & spares
- Brakes
- Cassettes & freewheels
- Chains
- Chainsets & chainrings
- Derailleurs - front
- Derailleurs - rear
- Forks
- Gear levers & shifters
- Groupsets
- Handlebars & extensions
- Headsets
- Hubs
- Inner tubes
- Pedals
- Quick releases & skewers
- Saddles
- Seatposts
- Stems
- Wheels
- Tyres
- Health, fitness and nutrition
- Tools and workshop
- Miscellaneous
- Buyers Guides
- Features
- Forum
- Recommends
- Podcast
forum
Shimano Ultegra Compatibility
If I'm reading the Shimano Di2 compatibility chart correctly, the front ST-6870 shifters going to a SM-EW67 junction to an FD-6870 will work with a RD-R8050 rear derrailleur without having to do any mods and/or firmware changes. I'm getting cross signals from several people and want to make sure everything is hunky-dory before I pop for the RD-R8050.
Thanks for your inputs.
If you're new please join in and if you have questions pop them below and the forum regulars will answer as best we can.
Latest Forum Topics
Latest Comments
- sheridan 2 min 6 sec ago
They're not just driving on the cycle lane - I saw school kids having to walk on the closed-off road to get out of the way of the pavement drivers...
- dave atkinson 35 min 30 sec ago
i've run a manual update this morning so everyone that's a subscriber should be able to access the game ok, let me know if not!
- OldRidgeback 59 min 10 sec ago
Yes indeed, 89 was a great year for music and it was good to hear so many excellent tracks being played. I listen to R6 a lot.
- brooksby 1 hour 4 min ago
Bus driver who killed two women after accelerating instead of braking spared jail...
- brooksby 1 hour 8 min ago
Cough, cough - Matthew Briggs - cough, cough.
- kinderje 1 hour 52 min ago
Have you tried Garmin customer service? My charging door woudn't close properly and would shake loose on every ride. A call to Garmin and they put...
- Pot00000000 2 hours 6 min ago
That's a great looking bike. Shame it's a Bianchi
- Ride On 11 hours 35 min ago
I ended up using Parcelforce - paying online and printing off a sticker - then drop off at the post office. I came across a couple of things worth...
- Rendel Harris 11 hours 41 min ago
Reckless doesn't exist as a charge in the UK, it's either careless or dangerous.
Add new comment
3 comments
If you have the older SM-BTR1 (external) or SM-BTR2 (internal) battery, it may not work and if you have the SM-EW67 junction you probably do. There's a better chance of the RD-R8050 working if you have the BT-DN110 battery. I don't think this works with that junction so you'll need the SM-EW90 for that to work.
I know you said you'd rather not do any updates but if you have access to a SM-PCE02 linkage device, this will allow you to check and update individual components separately without having the whole system connected and working first.
You could try the newer rear derailleur first and I'd be interested in how you get on.
Correction to junction box, I have the SM-EW90-A. Installed the RD-R8050 and it crashed the Di2 system. It appears firmware updates are needed. Since I don't know which component requires an update/s I'll do it when I get the FD-R8050.
Thanks for your help, mark1a.