Built up with SRAM Red, Hollowgram SiSL chainset, custom Berk one-piece seatpost / saddle combo, and Enve 45 tubular wheels. Lives up its name, coming in at 5.41 kg:
And here is a 4.38 kg example; built up with Campy Super Record, THM Clavicula chainset, and AX Lightness 24 wheels / Extralite hubs:
