Limited to 300 bikes globally, the Aethos Founder’s Edition is the lightest build on offer.When compared to the S-Works Aethos, this limited Founder’s Edition S-Works Aethos may seem like it just features a different handlebar—and while the Roval Alpinist, At 255 grams (110mm x 420mm) is one of the lightest out there, the Founder’s Edition S-Works Aethos features much, much more.