The Argon 18 Sum Pro Frameset gives you the aero-optimized Sum Pro carbon frame and matching fork—perfect if you’re building a custom high-performance road bike. With features such as hourglass headtube, draft-deflecting fork blades, and integrated cable routing, this frameset is built for minimum drag and maximum efficiency. Compatible with electronic or mechanical drivetrains, it allows builders to choose components while retaining the Sum Pro platform’s stiffness, aerodynamics, and aesthetic polish.