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Amazon.com : Shimano Ultegra FD-R8150 Di2 Front Derailleur - 2x12-Speed, Braze-on, Down Swing, for 50-54t Max, Black/Silver : Sports & Outdoors
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Universal Cycles -- Shimano FD-5700 105 Double Front Derailleur - 10 Speed [IFD5700FL, IFD5700BSML, IFD5700BLL]
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