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.
Front Derailleur
Ultegra FD-6870
The Shimano FD-6870-F is a braze-on road Di2 front derailleur that can also be mounted using a clamp. It weighs 138.5 g and supports a top gear maximum of 46T-53T & total capacity of 16T.
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When used with the BT-DN110 battery, the 6870 derailleurs are also synchronized shift capable. This front derailleur doesn't allow for as much flexibility as the newer ones do though.
Read more on that in my complete guide to synchronized shift.
Specifications
- Model code
- FD-6870
- Series
- Ultegra 6870
- Weight
- 138.5g
- Total capacity
- 16T
- Chain line
- 43.5mm
- Top gear teeth
- 46T - 53T
Related components
View all components
Installation Guide: Ultegra FD-6870 / DURA-ACE FD-9070 Di2 Front Derailleur
Bought a new Di2 derailleur or have to replace your old one? Read FD-6870 / FD-9070 Di2 Front Derailleur installation instructions here.
Set up Front derailleur limits (two bolt derailleurs: 6770, 6780, 9070)
Read how to set up your two-adjustment-bolt Di2 Front Derailleur (Ultegra FD-6870, DURA-ACE FD-9070)
Understanding Di2 derailleur specifications
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.