Shimano R-8100 Ultegra di2 Hydraulic Disc Brake 12-speed mini groupset
Very low miles. Chain was always waxed. All the components function with zero issues. EW-SD300 Di2 wires (2x). BT-DN300 Di2 battery for 12-speed system. R8100 Shimano Ultegra 12-speed 11/30 cassette.