Are you thinking about getting a roof box but worried about how it might affect your car’s performance? You’re not alone! Roof boxes are a great way to increase storage space, but choosing the right one is important to keep your car as fuel-efficient and aerodynamic as possible.
The best aerodynamic roof boxes are designed to reduce drag, meaning you won’t feel like you’re driving against the wind every time you hit the road. But what exactly makes a roof box aerodynamic, and how do you find the right one for your vehicle? Let’s break it down.
Why Get a Roof Box?
If you’ve ever packed for a road trip and found yourself struggling to fit everything in your car, you know how useful extra storage can be. Roof boxes provide that extra space, but they also come with pros and cons.
The Benefits of a Roof Box
✅ More Storage Space: No more cramming bags between passengers or overloading the boot—everything has its place.
✅ Always Ready to Go: Unlike a trailer, a roof box stays on top of your car without needing to be hitched and unhitched.
✅ Great for Bulky Items: Suitcases, camping gear, ski equipment, and other odd-shaped items fit perfectly in a roof box.
✅ Keeps Belongings Secure: No more shifting cargo in the boot—your gear stays put and protected.
Things to Consider
⚠️ Fuel Efficiency: A bulky roof box can create drag, affecting your miles per gallon. Choosing an aerodynamic model reduces this impact.
⚠️ Height Restrictions: If you’re driving through low-clearance areas like multi-storey car parks or underpasses, keep in mind that a roof box adds height to your vehicle.
What Makes a Roof Box Aerodynamic?
All roof boxes are designed with aerodynamics in mind, but some perform much better than others. Here’s what to look for when choosing a low-drag, high-efficiency roof box:
🔹 Shape Matters: A longer, thinner box with a tapered front moves through the air more smoothly than a tall, bulky one. Think of it like a paper aeroplane—pointed and streamlined flies better than a flat, wide sheet.
🔹 Lower Profile: A low-profile box hugs the roof of your car, reducing wind resistance.
🔹 Tapered Design: A box that narrows towards the front allows air to flow over it more easily, decreasing drag.
🔹 Lightweight Material: Durable yet lightweight materials keep weight down without sacrificing strength.
Are Soft Roof Boxes Aerodynamic?
Soft roof boxes are made from flexible materials and don’t have a rigid shape. While they’re still designed to be aerodynamic, they may not be as efficient as a hard-shell box. Their shape can change depending on how they’re packed, sometimes creating extra wind resistance.
If you’re set on a soft roof box, look for one that maintains a slim, compact shape and pack it strategically to keep it as streamlined as possible.
Choosing the Most Aerodynamic Roof Box
When shopping for a roof box, keep these key factors in mind:
✅ Length vs. Height: A longer, lower box is better than one that’s tall and wide.
✅ Tapered Front: A sloping front edge helps reduce air resistance.
✅ Lightweight Construction: A lighter box reduces the overall weight on your car, improving fuel efficiency.
✅ Fits Your Car Size: If you have a smaller car, don’t go for an oversized box—it will create unnecessary drag.
✅ Weight Limits: Every car has a maximum roof load—consider both the box’s weight and what you’ll pack inside.
Other Features to Look For
Aerodynamics isn’t the only thing that matters when choosing a roof box. Here are some additional factors to consider:
1. Compact Storage
If you’re tight on space when not using your roof box, soft cargo bags fold up easily, while some hard-shell models have a slimmer storage profile.
2. Storage Capacity
Consider both volume (cubic feet or litres) and weight capacity (typically 100-165 lbs). Some models are designed for specific gear like skis, camping equipment, or musical instruments.
3. Durability
A good roof box should handle rain, snow, and road debris without damage. Look for waterproof and UV-resistant materials to protect your belongings.
4. Easy Access
Some roof boxes open from both sides, making loading and unloading much easier. Others have secure locking systems to keep your gear safe while travelling.
5. Aesthetics & Fit
A roof box doesn’t have to look awkward on your car. Many brands offer sleek, modern designs in different colours and finishes to match your vehicle.
Final Thoughts: Choosing the Right Aerodynamic Roof Box
Manufacturers design all roof boxes with aerodynamics in mind, but some are more fuel-efficient and travel-friendly than others.
For the best performance, look for a long, low-profile box with a tapered front and lightweight construction. This will minimize drag, reduce wind noise, and keep your car running smoothly.
If you need extra storage but don’t want to compromise on efficiency, check out our range of aerodynamic roof boxes to find the perfect fit for your next adventure!