
Index Rear Derailleurs and set Front Derailleur limits using E-Tube Project
Learn how to set up your di2 front derailleur electrical limits and index or micro-adjust your di2 rear derailleur using E-Tube Project 4.

Its low sprocket max capacity is 40T for 3x11 setups, 42T for 2x11-speed and 46T for 1x11-speed setups. The max front difference is 18T and its total capacity is 41T.
One of the MTB displays (SC-MT800 display or the XTR SC-M9051) is required if you want to use synchronized shift with MTB derailleurs.

Learn how to set up your di2 front derailleur electrical limits and index or micro-adjust your di2 rear derailleur using E-Tube Project 4.

Indexing Di2 rear derailleurs is done through micro-adjustment. The MTB Di2 rear derailleur process is slightly different from that of road RDs. Read how to set up your MTB rear derailleur and stop that chain rubbing noise.

What is a rear derailleur's total capacity, really? Why is there a top sprocket minimum? And what about front derailleurs? Chain line, total capacity, Top gear teeth? This page explains all of those, and more.