Cycling Aerodynamic Body Positioning: The Aero Shrug, Forearm Alignment & CdA

Aerodynamic drag accounts for over 85% of total mechanical resistance at 40 km/h, with 80% generated by the rider’s frontal surface area.

Adopting an Aero Shrug posture with 90-degree horizontal forearms on the hoods drops aerodynamic drag coefficient (CdA) by 0.02 m², saving upwards of 40 Watts over upright positions.