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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.

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Learn how to install Di2 components and accessories using these simple installation guides. Install derailleurs, junctions, bike wiring, D-fly / Wireless modules and more. 