The aerodynamics of carbon wheels: an asset for speed

Aerodynamics in cycling: why carbon wheels make a difference

Aerodynamics is a key factor for any cyclist looking to improve their performance, especially at speeds above 30 km/h. Indeed, at this speed, about 80% of the resistance encountered by a cyclist comes from air resistance. Reducing this drag force not only saves energy but also increases average speed, a crucial issue in competition as well as in intensive training.

 

Why is aerodynamics so important in cycling?

During a road effort, the power provided by the cyclist primarily serves to overcome three types of resistance: rolling resistance, gravitational resistance (uphill), and aerodynamic resistance. At moderate speeds (around 20-25 km/h), rolling resistance dominates, but as soon as the speed crosses the 30 km/h threshold, aerodynamic resistance becomes predominant.

Studies show that aerodynamic drag accounts for up to 80% of total resistance at 40 km/h, and this figure can rise to over 90% in high-speed sprints. Thus, optimizing aerodynamics is essential for any cyclist looking to increase their energy efficiency, top speed, and reduce fatigue over long distances.

The impact of carbon wheels on aerodynamics

Wheels play a major role in air resistance. The profile and design of the rims directly influence the cyclist's ability to cut through the air.

• High rims (50 to 80 mm) offer better air penetration, which reduces aerodynamic drag. This reduction translates into a noticeable increase in cruising speed, especially on flat terrain or downhill.

• U-shaped vs V-shaped: U-shaped rims are preferred for their better handling of crosswinds. They offer more stability and reduce wind-induced deviation, a significant advantage on exposed courses. V-shaped rims, on the other hand, perform slightly better in perfectly aligned headwind conditions but may be less maneuverable.

Case study: measuring the aerodynamic impact of carbon wheels

A study conducted by a brand specializing in carbon wheels compared the performance of a pair of classic aluminum wheels with a pair of high-profile carbon wheels on a flat 40-kilometer course, at an average speed of 35 km/h.

The results are impressive:

• The average time gain reaches 45 to 60 seconds over 40 km, representing an improvement of more than 2% in average speed.

• This reduction in aerodynamic resistance corresponds to a saving of about 15 to 20 watts of power, which represents a significant decrease in the effort exerted.

• Riders who have tested carbon wheels report an increased feeling of smoothness and better stability in crosswinds thanks to the studied profile of the rims.

These figures confirm that carbon wheels with an optimized aerodynamic profile provide a real competitive advantage, particularly in disciplines where every watt counts, such as time trials, triathlons, or road racing.

How carbon wheels improve aerodynamics and boost your performance

For cyclists looking to significantly improve their performance, aerodynamics is an essential criterion. Aerodynamic carbon wheels are now positioned as the ideal solution to reduce aerodynamic drag and gain speed. The choice of high-performance carbon rim profile is crucial: U-shaped or V-shaped models each offer specific advantages depending on wind conditions and the type of course.

The best carbon wheels, specially designed for time trials, combine lightness and rigidity, thus ensuring optimal efficiency on the road. Moreover, tubeless carbon wheels provide an additional gain in speed and comfort, thanks to better grip and reduced rolling resistance.

Aerodynamic optimization in cycling therefore relies on advanced technical components, and carbon wheels are at the heart of this revolution. They meet the expectations of modern cyclists who seek a perfect balance between performance, lightweight, and stability, in order to maximize their potential on the road.

Conclusion: carbon wheels, a high-performance investment for aerodynamics

Carbon wheels represent an essential solution for optimizing aerodynamics in cycling. Their advanced design, combined with suitable rim profiles, significantly reduces air resistance, saves power, and increases average speed. Whether for competitors or enthusiasts looking to improve their comfort and performance, investing in aerodynamic carbon wheels is a winning strategy in the long run.