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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
Amazon.com : JGbike ~180g Lightweight 11 Speed Single Piece Cassette for Road Gravel cyclecross Bike, for Shimano Dura Ace Ultegra or SRAM Red Force for Triathlon - The Best Value Cassette Available :
Amazon.com : Shimano Ultegra Di2 RD-R8050-SS Rear Derailleur - 11 Speed, Short Cage, Black : Sports & Outdoors