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Stuck installing your new Di2 rear derailleur? Read how to install the RD-RX805 / RD-RX815 / RD-RX817 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. 

RD-RX805 / RD-RX815 / RD-RX817 Di2 Rear Derailleur installation guide