If you're an outdoor enthusiast or someone who frequently carries extra gear on your vehicle, you’ve probably invested in a set of roof bars. Among the leading brands in this category, Thule stands out with its reputation for quality, durability, and sleek designs. However, one common issue that many users encounter when installing roof bars—whether for carrying skis, bikes, or a rooftop box—is the unwanted wind noise.

Wind noise is a phenomenon that occurs when air flows over the roof bars and any load mounted on them. The increased airflow can create turbulence, leading to a high-pitched hum or whistle that can be both distracting and irritating, especially during long drives. In this blog post, we’ll explore the reasons behind wind noise from Thule roof bars, and offer practical tips to reduce or eliminate it.

Why Does Wind Noise Happen?

Wind noise is typically caused by the airflow disruption around your vehicle, especially when you add roof accessories like bars, boxes, or racks. Thule roof bars, while aerodynamically designed, can still create turbulent airflows. These air currents are affected by several factors:

• Bar Design: While Thule bars are engineered to be as quiet as possible, their rectangular or square shapes are less efficient in reducing wind drag compared to more streamlined designs.
• Load Configuration: The type of load you are carrying on the bars can influence wind noise. Items like roof boxes, bike racks, and kayak holders can create additional drag, which exacerbates the problem.
• Vehicle Shape and Size: The make and model of your car play a significant role. Vehicles with larger roof profiles or boxy shapes tend to experience more wind turbulence than those with sleeker designs.
• Speed: The faster you drive, the more pronounced the wind noise becomes. This is particularly noticeable at highway speeds or when traveling with loads that generate substantial air resistance.

How to Reduce Wind Noise from Thule Roof Bars

While it might be impossible to eliminate wind noise entirely, there are several effective strategies to minimize it and enjoy a quieter ride.

1. Opt for Thule’s Aerodynamic Roof Bars

Thule offers a range of roof bars, and some are designed specifically with wind noise in mind. Their WingBar and Wingbar Edge models feature an aerodynamic profile that reduces drag and turbulence. The WingBar design, in particular, has a smooth, slanted shape that helps air flow more smoothly over the bars, significantly reducing wind noise compared to the standard square or round bars.

2. Install a Wind Fairing

A wind fairing is a simple yet effective solution for cutting down on wind noise. It’s a plastic or metal shield that attaches to the front of the roof bars, diverting air around the bars and preventing turbulence. Thule offers a specific wind fairing designed to fit their roof bars, providing a significant reduction in noise.

3. Tighten and Secure Your Roof Load

If you’re carrying a load on your Thule roof bars, make sure it’s tightly secured. Loose or unevenly placed gear can create additional drag, which increases wind noise. Thule’s cargo boxes, bike racks, and other accessories come with built-in systems to ensure a snug fit, which helps reduce noise.

4. Use Bar End Caps

Some Thule roof bars come with open ends that can amplify wind noise. By installing bar end caps—which are small plastic or rubber covers that fit over the exposed ends of the bars—you can reduce wind drag and noise. This small, inexpensive addition can make a noticeable difference.

5. Consider a Roof Box with Better Aerodynamics

If you regularly use a rooftop cargo box, choose one with an aerodynamic design. Thule’s Motion XT and Force XT boxes, for example, are designed to cut down on wind resistance and reduce noise. Opt for low-profile designs that minimize air resistance.

6. Drive More Slowly

While it’s not always possible to avoid highway speeds, driving more slowly can lessen the intensity of wind noise. If you’re traveling with a load on your roof, consider adjusting your speed slightly to see if it makes a difference.

7. Seal Gaps and Loosen Straps

Sometimes, wind noise can be caused by gaps in the fitment of your roof bars and the accessories mounted on them. Check that everything is properly installed and the straps are tight, as loose components can amplify the sound. Adding a soft gasket or seal to gaps can help reduce the noise from flapping or vibrating.

Conclusion

Wind noise from Thule roof bars is a common concern for many drivers, but with the right approach, it can be minimized or even eliminated. Whether you're upgrading to more aerodynamic bars, installing a wind fairing, or simply securing your load more tightly, there are several practical steps you can take to make your driving experience quieter and more enjoyable.

Investing in quieter roof bars and accessories will not only make your ride more comfortable but also help you focus on what matters most—whether that’s reaching your destination with your gear securely on top, or simply enjoying a peaceful drive.