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Amazon.com : Shimano Alfine SG-S7001 8-Speed Internally Geared Disc Brake 36h Rear Hub Black, Small Parts Not Included : Sports & Outdoors
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SHIMANO ALFINE DI2 SG-S7051-11 Internal Geared Rear Hub - CENTER LOCK - Disc Brake 11 Speed - alex's cycle
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Universal Cycles -- Shimano SG-S7001-8 Alfine 8 Speed Rear Hub [ISGS70018BL, ISGS70018AL, ISGS70018BS, ISGS70018AS]
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