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Amazon.com : JKSPORTS SHIMANOSLX M7100 1x12 Speed MTB Groupset 10-45T/10-51T, 32T/34T/170MM/175MM with Brake (170mm 32t, Cassette10-51t) : Sports & Outdoors
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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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