Go Back  Bike Forums > Bike Forums > Bicycle Mechanics
Reload this Page >

Di2: Ultegra ST-6770 and 11 speed 1x setup

Bicycle Mechanics Broken bottom bracket? Tacoed wheel? If you're having problems with your bicycle, or just need help fixing a flat, drop in here for the latest on bicycle mechanics & bicycle maintenance.

Di2: Ultegra ST-6770 and 11 speed 1x setup

Old 03-18-23, 07:55 PM
Senior Member
Thread Starter
Join Date: Apr 2016
Location: Ontario
Posts: 558

Bikes: HP Velotechnik Streetmachine GTE, 2015 Devinci Silverstone SL4, 2012 Cannondale Road Tandem 2, Circe Morpheus, 2021 Rose Backroad, 2017 Devinci Hatchet

Mentioned: 5 Post(s)
Tagged: 0 Thread(s)
Quoted: 181 Post(s)
Liked 14 Times in 12 Posts
Di2: Ultegra ST-6770 and 11 speed 1x setup

The Ultegra ST-6770 di2 STI is originally from the 10 speed ultegra groupset. There are reports on the internet that a firmware update in 2014 made it a requirement that both front *and* rear derailleur must be from a 10 speed groupset, or a 11 speed groupset to work with the ST-6770 (but not mixed).
I am contemplating using a ST-6770 with an 11 speed rear derailleur (the RD-RX815 would be a good match for my use), but in a 1x configuration. Does anyone know if the ST-6770 will work with just one 11 speed DI2 derailleur and up-to-date firmware?

alias5000 is offline  
Old 03-19-23, 06:55 AM
Di2 fanatic
TerryDi2C's Avatar
Join Date: Aug 2019
Location: The Netherlands
Posts: 137
Mentioned: 2 Post(s)
Tagged: 0 Thread(s)
Quoted: 51 Post(s)
Liked 58 Times in 37 Posts
Yes, all road/mtb 10-speed and 11-speed Di2 shifters (except 7970) can be used with any 11-speed / 10-speed derailleur, no problem.

(Pages 2/4: https://bike.shimano.com/content/dam....1.2-00-EN.pdf)
TerryDi2C is offline  

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Thread Tools
Search this Thread

Contact Us - Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service - Do Not Sell or Share My Personal Information -

Copyright © 2023 MH Sub I, LLC dba Internet Brands. All rights reserved. Use of this site indicates your consent to the Terms of Use.