Roof boxes can potentially damage your car if not installed properly or if they exceed the recommended weight limit, causing strain on the roof. Regular checks, proper installation, and adhering to weight limits can help prevent such damage.
This question circled in many car owners’ minds – do roof boxes damage the car? Shortly, yes! It can severely damage your car if you fail to install it correctly. Therefore, a severe accident might occur. The possibility of such an incident increases if you carry heavy items on the product. Heavy items on the box, and you’re driving the car at the highest speed on a rainy day!
It’s a potential scenario for an accident! Sad but true! Before taking things on a box, ensure that it is highly secured and mounted correctly on the vehicle’s rooftop. Otherwise, things could go wrong and ultimately cost you a lot of money.
Do Roof Boxes Damage Your Car?
It’s a big question, and people seek a proper answer to it. The answer is yes. A roof box can badly damage a car if it isn’t installed firmly. A powerful twisting force might join between the roof box and its nut bolts. As a result, the car can lose its stability and standard power. This could result in a severe accident when you’re on a road journey.
Everyone will surely want to avoid such a scenario. For this reason, it is essential to install the roof box perfectly. So, you don’t have to deal with the roof box. This is how you can avoid any serious injury.
You can check this article, “How to install a roof box in a car” to learn the procedure of installing a roof box in your car.
Steps to Take While Using a Roof Box
Yes, your car contains a roof box placed at the top of the roof. But does that mean you will install it and go?! Nope! You need to do some extra job. Otherwise, the lifespan of the roof box will get shorter. Let’s take the steps –
Read the Setting Manual
When you buy a new product, especially an expensive thing like a roof box, you must check the manual given by the manufacturing company. Thus, you need to do the task according to their guidelines. This is how you can ensure the path of safety and security.
You could face a challenge when installing the roof box for the first time. As a result, there’s a chance things could go wrong. But, you can escape any contravention effortlessly.
Take the Professional’s Help
You could face a challenge when it is the first time in the installation process. Therefore, a wrong move can happen. To avoid it, you should take help from a professional. This is how you can avoid any big mistake.
Lubricate on a Regular Basis
It’s easy to surmise that the product can get worn out. Since the box stays on the rooftop, it has to fight against adverse weather conditions like rain, snow, etc. That’s the reason the corrosion on the box might happen. Due to this, it can lose its supremacy and begin to wear down fast.
For this reason, you should use lubricant regularly to prevent it from being worn out. Moreover, this is how you can protect this expensive product from corrosion and rust.
Remove the Box Until You Need it
There’s no need to put the box on the car’s rooftop when you’re not using it. The reason is it could badly affect the exhaustion of the fuel. Yes, the roof box is made of lightweight elements and manufacturing companies always try to use soft materials during the production; the roof box still can significantly impact fuel spending.
For this reason, you should remove it. Further, removing it without necessity keeps the vehicle’s roof top steady. In addition, it also assists in decreasing the noise of the wind.
Check out the Weight
This is a highly crucial matter. Before putting your personal belongings in the roof box, you have to check the manual to discover the weight limit of the product. Afterward, put all the things according to the weight limit. Don’t overload the roof box. Otherwise, things could go wrong.
If you don’t check the weight limit, your car and other people’s cars will be in danger. The reason is that the box and its belongings can fall off in extremely windy weather while driving the vehicle. Therefore, don’t neglect it and check out the weight carefully.
Don’t Overspeed the Vehicle
Yes, you must drive the car with the roof box on the top. But, don’t cross the speed limit while you’re in motion. Always maintain the required speed limit. Hence, if you cross the limit, both you and other people could face danger. For instance, you’re driving your car at the highest speed.
Suddenly you need to turn the car. What would happen? You have to turn the steering wheel so fast. As a result, the roof box can fall into the road. After that, your car and other peoples’ cars could be damaged badly. Even the possibility of an accident can’t be ruled out. So, be careful and stay safe!
Do Roof Boxes Damage Your Car? FAQs
Why do I need a roof box?
If you’re a frequent traveler and regularly go outdoors, you need a roof box. Sometimes, your car’s trunk might not contain enough space? What then? You need a box to carry the extra belongings. It saves the space within the car’s trunk and makes the journey more comfortable.
What types of damage can a roof box do to a car?
If you fail to install the box correctly in the vehicle, there’s a big chance that the roof box can cause severe damage to your car. For instance, it can scratch the color of the rooftop. Further, heavyweight products can wear and tear the paintwork of the car. Sometimes, overloading and wrong installing can turn into an accident.
Can a roof box impact on a car’s MPG?
Of course, it can. If you add more weight to it, the aerodynamics of the box can’t do the job correctly. As a result, the drag increases steadily, resulting in more gas mileage.
Does the box spend more fuel?
Yes, it is. The box carries more weight. For this reason, the final weight of the vehicle also increases. Therefore, the amount of fuel also inflates.
Final Say
So, we’re at the end of our discussion. We hope you’ve got enough knowledge on how the roof boxes damage the car? You need to be careful about that. This is the only way you could eliminate the chances of damaging the car. Install it correctly and follow the other guidelines provided by us.
Now, do you have any questions regarding our article? You can question it in the box below.
Best Seller List of Roof Cargo Boxes:
- 18 cubic foot (510 L) internal cargo capacity
- Made from durable UV-resistant ABS material
- Rear opening for easy access away from traffic
- Tool-free mounting hardware for easy installation and removal
- Includes key and lock to secure contents in the box, and the box to your rack
- Fits SportRack Rack Systems, square bars, round bars and most factory racks (check fit guide)
- Dimensions (LxWxH): 63 x 38 x 19 in / 160 x 96.5 x 48 cm
- Min-Max Crossbars Spacing: 23 5/8 - 29 3/4 in (60 - 75.5 cm)
- Max Weight Capacity: 100 pounds (45 kg)
- Secure & protect your gear in this 18 cubic ft. HDPE plastic hard shell vehicle cargo carrier; high-capacity interior dimensions 57 L x 38 1/2 W x 17 3/4 H inches; aerodynamic design for fuel efficiency
- Weatherproof storage for your luggage with a four corner locking system, front latch, and weather-tight seal for ultimate car rooftop protection and security
- Easy & convenient loading and unloading from either side of the car make for smooth travel and hassle-free storage
- No tools required, easy assembly and installation on Vehicles with Roof Luggage Rails and Crossbars.All mounting hardware and simple instructions are included to get you safely on the road quickly. The base is pre-drilled for 24in crossbar spacing - if your vehicles crossbars are NOT adjustable the plastic base can be re-drilled to match your vehicle (20in to 30in bar spacing)
- Made in USA, limited lifetime guarantee. The JEGS car top carrier’s high-quality construction and performance give you peace of mind
- Comfortably Holds 3 golf bags, up to 5 if stacked depending on size.
- Designed to fit ONLY on cross-rail systems rated at 150 lbs. and greater. (See Vehicles Owners Manual for Weight Carrying Capacity)
- This cargo carrier must be mounted onto a roof rack with horizontal crossbars
- Be sure to allow for clearance of rear hatchback, roof-mounted antennas, and navigation fins
- Load cargo carrier paying careful attention to distribute the weight evenly and not exceed the maximum allowed weight of the box or cross rails
- 【Durable & Weatherproof Hard-Shell Design】 Crafted from high-quality ABS material, this rooftop cargo box resists impacts, UV rays, and extreme temperatures. The 100% waterproof seal keeps luggage dry in rain or snow, while the aerodynamic shape reduces wind noise and improves fuel efficiency on long trips.
- 【Massive 17 Cu-Ft (480L) Storage Capacity】 With dimensions of 61.42"L x 30.71"W x 14.96", this carrier provides extra space for bulky gear like suitcases, camping equipment, or ski gear. Holds up to 165 lbs—ideal for family road trips or outdoor adventures without sacrificing cabin comfort.
- 【Universal Fit for Most Vehicles】 Compatible with cars, SUVs, and vans equipped with roof racks (crossbars required). Tip: Check your roof rack’s weight limit and spacing before installation for a secure fit.
- 【Dual-Side Opening for Easy Access】 The convenient two-way opening lets you load/unload from either side of your vehicle—perfect for tight parking spots. Includes 2 security keys and 2 reinforced straps to lock contents and prevent shifting during transit.
- 【Easy Installation & Hassle-Free Use】 Designed for quick and tool-free setup, this cargo box securely attaches to most roof racks in minutes. The lightweight yet sturdy construction makes it easy to load and unload, while the low-profile design ensures minimal impact on your vehicle’s height clearance.
- 【DURABLE CONSTRUCTION】Crafted from high-quality ABS material, the hard shell rooftop cargo box ensures long-lasting durability. Its waterproof and UV-resistant design protects luggage from various weather conditions, making it ideal for road trips. The aerodynamic shape also reduces fuel consumption and noise for a smoother ride
- 【SPACIOUS 12/14 CUBIC FEET STORAGE】With dimensions of 54.3"L x 31.5"W x 13.4"H/62.2"L x 31.5"W x 13.4"H, the rooftop cargo box offers 12 cubic feet (340L) of extra storage space. With a maximum capacity of 165 lbs, it significantly increases storage capacity for your belongings
- 【UNIVERSAL FIT】Compatible with all vehicles equipped with a roof rack, including cars, vans, and SUVs. Prior to purchase, please verify compatibility by checking the roof rack fitting guidelines
- 【CONVENIENT DUAL-SIDED OPENING】The dual-sided opening system allows easy access from both sides of the cargo box. Includes 2 keys and 2 straps for added security. Ensure one side is locked when opening the other side
- 【RELIABLE WARRANTY】 is committed to delivering high-quality products and meeting customer expectations. Enjoy a one-year warranty for added peace of mind. For any inquiries, our team is available to assist you within 24 hours
- Universal Fit - This roof top storage box is universal fit for mounting to max 13 inches wide cross bar, please check the dimension before purchase.
- Spacious Capacity - Expand your vehicle's cargo capability significantly with 11 cubic feet of spacious storage and a robust 110 lb weight limit. Designed with a 14-inch wide opening for easy loading of large gear, this box provides ample room for luggage and essentials while keeping your passenger area comfortable and uncluttered. It's perfect for families, road trippers, or outdoor adventurers.
- Secure Lock, Stable Travel - The key lock system keeps your valuables safe. You can only remove the key after all lock points are fully secured. The belongings and luckages stay firmly in place inside during your drive, even on bumpy roads – no shifting or falling out. Open it from the passenger side for easy loading and unloading.
- Impact-Resistant Protection - Built with UV-protected, weather-resistant ABS, the cargo box shields contents from rain, sun, snow, and impacts while maintaining structural integrity in all conditions for reliable long-term performance.
- Overall Dimensions - 53" L x 34" W x 15" H | Capacity: 11 Cubic Feet and up to 110 LBS. Package includes [1] 53 inches length storage box, [2] security lock key, and [4] heavy duty tool free installation mounting brackets.
- Spacious 14 Cu Ft Storage: This rooftop cargo carrier delivers a generous 390L (14 cubic feet) of space, making it the ideal car top carrier for family vacations, road trips, and sports adventures. Easily store camping gear, luggage, or ski equipment and free up valuable cabin room.
- Rugged Hard Shell Protection: Made from tough, UV-resistant ABS, this rooftop cargo carrier hard shell guards your belongings against rain, sun, dust, and road debris—providing reliable protection in any weather conditions.
- Secure & Lockable Design: The roof cargo box is equipped with built-in straps and a dependable locking mechanism, plus included keys. Keep your items stable and safely locked inside the cargo box on every journey.
- High Capacity & Hassle-Free Mounting: With a robust 165 lbs weight limit, this cargo box installs quickly and securely onto most vehicle roof racks or crossbars—no tools required. Always check your roof rack compatibility before purchase.
- Aerodynamic & Universal Fit: The streamlined, low-profile roof cargo box design reduces wind noise and drag, while fitting most cars, SUVs, and vans. Enjoy extra rooftop storage without compromising your driving comfort or vehicle performance.
- Durable and Weather-Resistant: Made from high-quality UV-protected ABS material, this hard-shell rooftop cargo box helps protect your belongings from rain, sun, and snow. Its sturdy design keeps luggage safe during travel while offering long-lasting performance.
- Spacious 14 Cubic Feet Storage: With 14 cu ft (390L) of internal space and a maximum capacity of 165 lbs, this cargo box provides extra room for luggage, gear, or sports equipment like skis. The wide opening makes loading and unloading easier.
- Easy Installation and Universal Fit: Tool-free mounting hardware allows quick setup on most roof racks up to 33 inches wide. Compatible with cars, SUVs, and vans—just verify roof rack dimensions before installation.
- Dual-Sided Access and Secure Lock: The dual-sided opening design provides convenient access from either side of the vehicle. Includes secure keys and straps to help keep your cargo stable while driving.
- Aerodynamic and Travel-Friendly: Designed with an aerodynamic shape to reduce wind resistance and minimize noise. This rooftop cargo carrier helps expand your vehicle’s storage without affecting driving comfort.
- Universal Fit - This roof top storage box is universal fit for mounting to max 13 inches wide cross bar, please check the dimension before purchase.
- Spacious Capacity - Expand your vehicle's cargo capability significantly with 12.7 cubic feet of spacious storage and a robust 110 lb weight limit. Designed with a 13.5-inch wide opening for easy loading of large gear, this box provides ample room for luggage and essentials while keeping your passenger area comfortable and uncluttered. It's perfect for families, road trippers, or outdoor adventurers.
- Secure Lock, Stable Travel - The key lock system keeps your valuables safe. You can only remove the key after all lock points are fully secured. The belongings and luckages stay firmly in place inside during your drive, even on bumpy roads – no shifting or falling out. Open it from the passenger side for easy loading and unloading.
- Impact-Resistant Protection - Built with UV-protected, weather-resistant ABS, the cargo box shields contents from rain, sun, snow, and impacts while maintaining structural integrity in all conditions for reliable long-term performance.
- Overall Dimensions - 55" L x 34.5" W x 14" H | Capacity: 12.7 Cubic Feet and up to 110 LBS. Package includes [1] 55 inches length storage box, [2] security lock key, and [4] heavy duty tool free installation mounting brackets.
- Spacious 16 Cu Ft Storage: This hard shell roof cargo carrier offers a generous 16 cubic feet of space, ideal for road trips, vacations, or outdoor gear. Overall dimensions: 58.3"(L) x 35.4"(W) x 13"(H)
- Heavy-Duty ABS + PMMA Build: Made from durable ABS and PMMA materials, this car roof box is UV-resistant, impact-resistant, and weatherproof to protect valuables in harsh outdoor conditions
- Dual-Side Opening & Secure Lock: Features dual-side opening for convenient loading/unloading. Lock system ensures the key can only be removed when securely closed for maximum safety
- Tool-Free Installation: Quick and easy mounting with no tools required. Compatible with most round, square, and aerodynamic crossbars for universal fit on cars and SUVs
- Passenger-Side Accessibility: Designed for safety and convenience, the box opens up to 14.5" wide from the passenger side with strong support arms to hold the lid open during use
- Durable ABS and PMMA Material:Constructed with high-quality ABS and PMMA materials for impact resistance and weather protection, this roof cargo carrier ensures durability and shields your belongings from harsh outdoor elements.
- Spacious 13 Cubic Feet Capacity:Offers 13 cubic feet of storage space and supports up to 130 lbs of weight, making it perfect for long road trips, camping, and transporting bulky items like luggage or sports equipment.
- Double-Sided Opening for Easy Access:The dual-sided opening design allows for convenient loading and unloading from either side of the vehicle. The strong support arm keeps the lid open securely while you access your items.
- Secure Locking Mechanism:Equipped with a reliable locking system, the key can only be removed when all locking points are securely closed, ensuring the safety of your stored items during travel.
- Tool-Free Installation & Universal Fit:Easily installs without tools and is compatible with most roof rack types, including round, square, and aerodynamic bars, providing a hassle-free setup for a variety of vehicles.
- ▶Overall Dimensions: 55.91" L x 29.53" W x 14.96" H ▶Capacity: 13 Cubic Feet volume and holds up to 130 lbs
Last Update : 2026-02-11
