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![Universal Cycles -- Shimano RD-R8050 Ultegra Di2 Rear Derailleur - 11 Speed [IRDR8050SS, IRDR8050GS]](https://www.universalcycles.com/images//products/small/83993.jpg "Universal Cycles -- Shimano RD-R8050 Ultegra Di2 Rear Derailleur - 11 Speed [IRDR8050SS, IRDR8050GS]")