Weighing only 595 grams, the S-Works Aethos 2 is the lightest production road bike frame in the world. But the Aethos has never been just about weight. The Aethos 2 was created because we questioned the rules of racing to create pure riding pleasure on the road. It is designed to virtually disappear beneath you. Incredibly responsive, smooth, and exceptional. Thanks to increased tire clearance, optimized components, and a data-driven geometry for fit optimization, it offers more riders than ever before this unique riding experience. The Aethos 2 breaks the rules – out of love for cycling.