Are Aero Gains from Wheel Covers Worth It?

Exploring the Pros, Cons, and Real-World Impact for Road Cyclists

In the pursuit of marginal gains, many cyclists have considered adding wheel covers (disc covers) to their existing wheelsets to simulate the aerodynamic benefits of a full disc wheel—without the high price tag.

But do wheel covers really deliver meaningful aerodynamic improvements? And are they worth the potential trade-offs?

Let’s dive into the science, pros, cons, and whether they make sense for your riding style.

What Are Wheel Covers?

Wheel covers, often called disc wheel covers, are plastic or composite plates that attach to the rear wheel, covering the spokes to mimic the shape of a solid disc wheel.

They are:

Lightweight (compared to a full disc wheel)

Removable and affordable

Commonly used in time trials, triathlons, and by budget-conscious racers

Potential Aero Gains from Wheel Covers

Several independent tests, including wind tunnel studies, suggest:

Wheel covers can reduce drag by approximately 1% to 2% compared to a traditional spoked rear wheel.

Time savings can be around 30 to 60 seconds in a 40km time trial.

In some cases, wheel covers offer almost comparable aerodynamics to a true disc wheel.

These gains become more noticeable at higher speeds, typically above 35 km/h.

Pros of Using Wheel Covers

1. Affordable Aero Gains

Full disc wheels can cost over $1,000.

Quality wheel covers usually cost less than $150.

2. Easy to Install and Remove

Perfect for time trials or specific race days.

Allows versatility: one wheelset can serve multiple purposes.

3. UCI-Legal for Time Trials

Wheel covers are permitted in UCI-sanctioned time trial events (though not allowed in mass-start road races).

Cons of Using Wheel Covers

1. Added Weight

Wheel covers add about 300 to 500 grams to the wheel, mostly at the rim, which can slightly affect acceleration.

2. Potential Crosswind Issues

Like disc wheels, wheel covers can make the bike harder to control in crosswinds.

3. Maintenance and Fitment

Cheap or poorly fitted covers may rattle or shift during rides.

Some setups can be noisy, especially if not perfectly aligned.

4. Aesthetic Trade-offs

Some riders simply don’t like the look of wheel covers compared to sleek carbon disc wheels.

Are Wheel Covers Right for You?

Situation	Recommendation
Time Trials	Great budget-friendly aero upgrade
Triathlons	Cost-effective disc wheel alternative
Group Rides	Generally not worth the added weight
Hilly Courses	Aero gains often offset by weight penalty
Commuting	Unnecessary, can affect handling

If your priority is maximizing speed in flat time trials or triathlons without spending thousands, wheel covers are an excellent option.

If you mainly ride in hilly terrain, casual group rides, or windy areas, the potential drawbacks may outweigh the benefits.

Final Thoughts

Are aero gains from wheel covers worth it?
For speed-focused events like time trials, the answer is often yes—especially if you’re looking for an affordable upgrade.

For everyday road cyclists and climbers, the cost-to-benefit ratio is less favorable.

At Superteam, we recommend that competitive riders consider wheel covers as a stepping stone toward full disc wheels, but also prioritize overall wheelset quality, handling, and weight balance for all-around performance.