Ultegra Di2 R8000 Left Right Crank Arm 165mm 170mm 172.5mm 175mm Road Bike Crank 110bcd Crankset Bicycle Parts - Bicycle Crank & Chainwheel - AliExpress
Amazon.com : Shimano Ultegra FD-R8150 Di2 Front Derailleur - 2x12-Speed, Braze-on, Down Swing, for 50-54t Max, Black/Silver : Sports & Outdoors