What is CdA in cycling?

CdA is the drag coefficient (Cd) multiplied by the frontal area (A) of the rider and bike. Lower CdA means less aerodynamic resistance. Time trial positions typically achieve CdA of 0.20–0.25 m², while upright road positions reach 0.35–0.40 m².

How can I reduce my CdA?

Lowering the torso angle, narrowing elbow width, using an aero helmet, and optimising clothing can each reduce CdA by 0.01–0.05 m². A 0.03 m² reduction at 40 km/h saves approximately 15–20 W.

Cycling Aerodynamic Drag (CdA) Calculator

Calculate your cycling drag area (CdA) from speed, power, weight, and elevation data. Quantify aerodynamic gains from position or equipment changes.

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Frequently Asked Questions

What is CdA in cycling?

How can I reduce my CdA?