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Amazon.com : Shimano Rear DERAILLEUR, RD-R8000, ULTEGRA, GS 11-Speed, Shadow Design, Direct Attachment, W/OT-RS900(Black) : Sports & Outdoors
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Amazon.com : Shimano 105 RD-5701-SS Rear Derailleur - 10 Speed, Short Cage, Black : Rear Bike Derailleurs : Sports & Outdoors
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