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Amazon.com : JKSPORTS SHIMANODeore XT M8100 1x12 Speed MTB Groupset 32T/34T/ 51T,170MM/175MM (with Brake, 170mm32t) : Sports & Outdoors
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Source SHIMANO DEORE M5100 Groupset 1x11-Speed MTB Road Bike Crankset Shifter Rear Derailleur Cassette Bike Chain Groupset on m.alibaba.com
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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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