In the upgrade and modification of road bikes, the wheel set has always been one of the keys to improving performance. Among the many features of the wheel set, Aerodynamics is increasingly attracting the attention of cyclists. An optimized aerodynamic wheel set can not only reduce wind resistance but also save power output when cruising at high speeds, improving riding efficiency. So, how important is the aerodynamic performance of the wheel set? Let's analyze it from the following aspects.
1. How does aerodynamics affect riding?
When the riding speed exceeds 25km/h, air resistance becomes the main factor affecting riding efficiency. Above 40km/h, air resistance accounts for almost 80% of the total resistance. The wheel set can significantly affect the wind resistance performance as a high-speed rotating component on a road bike.
Lower wind resistance = less power loss
Better aerodynamic design = higher cruising speed
Optimize crosswind stability = improve handling
An aerodynamically optimized wheel set can provide a clear advantage in long-distance riding or competitions.
2. Aerodynamic design elements of wheels
Aerodynamic wheels mainly optimize wind resistance performance through the following aspects:
(1) Rim height (rim height)
Rim height is one of the core factors that determine aerodynamic performance.
Low-rim wheels (≤30mm): lightweight, fast acceleration, suitable for climbing, but average aerodynamic performance.
Medium-rim wheels (40-50mm): balance aerodynamics and handling, suitable for a variety of riding environments.
High-rim wheels (≥60mm): best aerodynamic performance, suitable for high-speed cruising, but greatly affected by crosswinds.
High-rim wheels can reduce turbulence and wind resistance when riding at high speeds, making riding more efficient.
(2) Rim outer width matching the tire
The outer width of modern aerodynamic wheels is usually 25-30mm to match wider tires (such as 25c or 28c). This can form a smoother transition interface, make the airflow more stable, reduce turbulence, and thus reduce wind resistance.
(3) Number and shape of spokes
A small number of flat spokes: reduce the frontal windward area and optimize aerodynamic performance.
Traditional round spokes: have greater wind resistance, but are light in weight and suitable for climbing wheels.
(4) Hub and hub design
The hub design affects air flow. The closed hub or low-resistance bearing design can reduce wind resistance and improve riding efficiency.
3. Applicable scenarios for high aerodynamic wheels
Flat roads and high-speed cruising: Maintaining high speeds (such as above 35km/h) for a long time can significantly reduce power loss and improve riding efficiency.
Time trials and triathlons: In high-speed TT or triathlon competitions, aerodynamic wheels can save a lot of power and improve the final results.
Road races: In sections that require high-speed cruising, aerodynamic wheels can reduce physical exertion, allowing riders to have more spare energy to exert force at critical moments.
Not suitable for windy environments or sections with many climbs: Although high-frame wheels have excellent aerodynamic performance, they may affect control in strong crosswind environments, and they are heavy and not suitable for long-term climbing.
4. Aerodynamic wheels vs. lightweight wheels: how to choose?
If your riding environment is mainly flat roads and high-speed cruising, or you need to save more energy in the competition, high-frame aerodynamic wheels are a better choice.
If your riding environment includes a lot of climbing, lighter low-frame or medium-frame wheels can make you more labor-saving when climbing.
The best choice is to choose the right wheelset according to your riding style and road conditions, or choose a 40-50mm mid-frame wheelset, taking into account aerodynamics and climbing ability.
Conclusion: The actual benefits of aerodynamic wheelsets
Generally speaking, aerodynamic wheelsets can save 10-15W of power output when riding at high speeds (above 35km/h).
In long-distance riding or competitions, optimizing wind resistance can reduce physical energy consumption and improve the ability to sprint to the finish line.
Suitable for flat riding, time trials, and road races, but the impact of crosswinds and weight factors needs to be weighed.
If you are looking for higher cruising speeds and smoother aerodynamic performance, choosing a suitable aerodynamic wheelset is a decision worth investing in.