Front Derailleur

Ultegra FD-6870-F

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-F
Series: Ultegra (6870)
Weight: 138.5g
Speeds: 11
SD50 ports: 1
Total capacity: 16T
Chain line: 43.5mm
Top gear teeth: 46T - 53T

Related components

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RD-6870-SS

Short Cage Rear Derailleur

RD-6870-GS

Medium Cage Rear Derailleur

ST-6870

Dual Control Lever

BT-DN110

Internal Battery

SM-EW90-A, SM-EW90-B

Below-the-stem Junction A

EW-RS910

Frame/Handlebar Junction

SM-BTR2

Internal Battery (deprecated)

EW-SD50

Electric Wire / E-Tube cable

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March 9, 2024Tips and Troubleshooting

10/11-speed Di2 beginner's guide to Di2

Just bought a new Di2 bike? This page explains what the buttons do, how to charge (and how often) and what synchronized shfit does.

January 22, 2024Tips and Troubleshooting

In-depth guide on upgrading your old Di2 bike

Does your old 10 speed Di2 bike need an upgrade to 11 speed? Want to add Synchro Shifting? This is the definitive Di2 upgrade guide.

October 17, 2023Installation Guide

Set up Front derailleur limits (two bolt derailleurs: 6770, 6780, 9070)

Read how to set up your two-adjustment-bolt Di2 Front derailleur (6870, 9070)

May 27, 2023Tips and Troubleshooting

Synchronized Shifting - the complete guide

Synchronized Shifting - what is it exactly? What does it do and how can you set it up? This page will guide you through the process of setting up synchro shift.

July 19, 2022Installation Guide

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.

Manuals & other documents

Ultegra 6870 Dealer Manual2.27mb
Download
Di2 Front Derailleur User Manual0.28mb
Download

Firmware updates

Below is an overview of all known firmware updates for this component. The changelog texts are Shimano's, and quite often they're a bit cryptic - sorry!

3.0.0 March 10, 2017
Additional function- Setting for synchronized shifting
2.6.2 April 10, 2015
Fixed SM-BTR2 bug
2.6.0 January 27, 2015
Improvement of shifting accuracy Fixed small bug of E-tube project adjustment
2.4.1 October 15, 2013
Enhancement of energy-saving.Enhancement of shifting performance, from front low gear to outer gear.
2.3.1 September 24, 2013
Enhancement of anti-vibration function