Installation Guide: 10-speed and 11-speed Di2 road Rear Derailleur
Bought a new Di2 rear derailleur and need some help installing it? Read how to install the RD-R8050 / RD-R9150 / RD-6870 / RD-9070 Di2 rear derailleurs.
Shimano's DURA-ACE RD-9070 rear derailleur is available in the short cage version only. Its **top sprocket max **is 14T, the min top sprocket size is 11T. The low sprocket max is 28T and the min is 23T. It has a **max front difference **of 16T.
When paired with 9070 / 6870 or newer components and the BT-DN110 battery, this derailleur supports synchronized shift.
Bought a new Di2 rear derailleur and need some help installing it? Read how to install the RD-R8050 / RD-R9150 / RD-6870 / RD-9070 Di2 rear derailleurs.
Did you know that you can mix Di2 components from different series and categories? Mixing derailleurs is not recommended, but anything else is fair game!
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.
Shimano front derailleur and rear derailleur specifications... what do they mean, really? This page explains all of them, and why they matter.