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Amazon.com : JKSPORTS OEM ShimanoUltegra R8000 Groupset 12-25T 50x34/52-36/53-39T 165/170/172.5/175mm (170MM, 50-34T) : Sports & Outdoors
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Amazon.com : JGbike Compatible MTB groupset for Shimano Deore M5100 11 Speed shifters & Rear Derailleur, KMC X11 Chain,Sunrace 11-51T CS-M5100 Cassette : Sports & Outdoors
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