Proven through third-party wind tunnel tests to be more aerodynamic from every yaw angle tested when compared to other leading aero road bikes Propel Advanced SL sets a new standard for speed. The Advanced SL-grade composite frame is engineered with Aero System Shaping Technology which saves 12-36 seconds over a distance of 40km at a speed of 40 kph compared to key aero bike competitors-with zero compromises in weight or stiffness & technologies including the Speed Control SL brake system integrated seatpost & internal cable routing. The result is clear: Propel Advanced SL is faster from every angle. Advanced SL-Grade Composite frame with Integrated Seatpost Advanced SL-Grade Composite Full-Composite fork with Over Drive 2 Steerer Electronic ready Giant Speed Control SL Ti brakes