The Argon 18 Sum Pro Shimano Ultegra Di2 offers snappy electronic shifting in the Sum Pro aero frame. With Shimano Ultegra Di2 2×12 drivetrain, it delivers precise, reliable shifting for both training and competitive use. The aero-optimized frame, internal routing, and effective compliance make this version a premium all-rounder. Aero wheels and matching tires complete the setup for speed, and the frame’s design ensures low drag and sharp handling. This build is suited for riders who want high performance with trusted componentry.