What is CdA in cycling?

CdA is the product of drag coefficient (Cd) and frontal area (A). It quantifies aerodynamic drag. Typical values: upright riding 0.45-0.55 m^2; road position 0.32-0.42 m^2; aero TT position 0.20-0.28 m^2.

How can CdA be measured or estimated?

Accurately measured via wind tunnel or field testing with power meter + GPS (virtual elevation method). Lower CdA can save 20-60 seconds in a 40km time trial. Position changes (lowering torso) are most impactful.

Cycling CdA Aerodynamic Drag Area from Position Calculator

Estimate cycling drag area (CdA) from rider position and speed. Aerodynamic drag is the dominant resistance above 20 km/h. Typical road position CdA: 0.35-0.40 m^2; TT position: 0.22-0.28 m^2.

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Cycling CdA Aerodynamic Drag Area from Position Calculator

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Frequently Asked Questions

What is CdA in cycling?

How can CdA be measured or estimated?