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Amazon.com : Shimano Dura-Ace FC-R9100 Crankset - 172.5mm, 11-Speed, 50/34t, 110 Asymmetric BCD, Hollowtech II Spindle Interface, Black : Sports & Outdoors
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Stages Cycling Power LR Power Meter Crank Set For Shimano Dura-Ace R9100 50/34 Teeth | thepadoctor.com
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