That mountain of luggage stares back at you. Suitcases are piled high, the kids are squished in the back, and you haven’t even left the driveway yet. Sound familiar? We’ve all been there, wishing for just a little more space in our cars.
When adventure calls—whether it’s a camping trip or a ski holiday—you need gear. But cramming everything inside your vehicle quickly becomes a headache. Choosing the perfect car roof box seems simple, but the market is flooded! You worry about size, security, fuel economy, and whether it will even fit your car. It’s easy to feel overwhelmed by jargon and endless features.
Don’t let storage stress ruin your next trip. This guide cuts through the confusion. We will break down everything you need to know about roof boxes, from understanding capacity to installation tips. By the end, you will know exactly which box suits your travel style and budget.
Ready to unlock serious cargo space and hit the road with confidence? Let’s dive into finding your perfect travel partner.
Top Car Roof Box Recommendations
- 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
- Functional rooftop cargo box provides 16 cubic feet of additional packing space
- Rugged and durable design keep contents protected
- FastGrip quick-mount system assembles in minutes
- Passenger-side opening for easy loading and unloading
- Central Locking system provides maximum safety
- 【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.
- 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
- 【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
- 【840D CHAMPION QUALITY MATERIAL】 Made with heavy-duty 840D abrasion-resistant PVC fabric, this ultra-durable car roof cargo carrier stands up to any rough treatment or harsh weather. Better still, the triple-reinforced welded seams make it hard to tear or rip for years to come.
- 【MORE THAN WATERPROOF】 Featuring waterproof zipper wrapped with 6 inches widened velcro zipper flaps, our vehicle cargo carriers will exceed your expectations with the waterproof effet. The reinforced seams will make it possible "zero leakage" even in downpours.
- 【EASY INSTALLATION】 Our roof rack cargo carrier comes with an anti-slip mat and 8 thickened adjustable straps that will keep the cargo bag in place. The smooth zipper, adjustable straps, door hooks and robust buckles allows you to effortlessly secure it to any car.
- 【SECURE FIT & LARGE CAPACITY】 Our 21 cubic feet rooftop cargo bag is compatible with vehicles with our without roof rack, the large capacity can keep the shape nicely, even when holding many luggage cases, blanket, tents, sleeping bags and more.
- 【PACKAGE LIST】You will receive 1x roof top carrier bag, 1x storage bag, 1x anti-slip mat, 6x padded door hooks, 2x extra luggage straps, 1x luggage lock.
- Compatibility issues:Not suitable door hook installation requires exposed metal frame (not glued seals). For crossbars, ensure at least 51 inch spacing. Avoid very small cars where the car roof luggage carrier may overhang.
- LARGE CARRYING CAPACITY: This premium Sailnovo Rooftop Cargo Bag 20 cubic feet of storage car bag capacity and can hold 5-7 suitcases, camping tents, sleeping bags, and more. Made of soft shell material, roof rack cargo carrier can be folded into a storage bag to save space when not in use! Note: Our roof bag is not suitable for vehicles with sliding doors.
- MORE SAFETY: Besides load capacity, stability is arguably the most essential factor in a vehicle's top carrier. Our car roof cargo carriers are designed with 6 built-in reinforced straps, extra 6 door hooks, and 2 long luggage straps. For safety reasons, the more straps and clips for securing the bag to the roof, the better!
- TEAR-RESISTANT & WATERPROOF: Features three layers of 1000D Oxford cloth waterproof material, Sailnovo rooftop cargo carrier bag is twice as strong as other brands' 500D fabrics. We found that different brands could easily tear through the seams, so our roof rack cargo carrier doubled up our seams and widened the waterproof zipper flaps!
- EASY TO INSTALL: We provide 6 heavy-duty tie-down straps and 6 safety hooks that can be easily attached to the vehicle's Luggage rack in minutes; fits most roofs with crossbars/side rails/baskets or bare tops without racks; fits most size vehicles such as cars, SUV's, pickups, station wagons, hatchbacks, hardtop crossovers.
- Functional rooftop cargo box provides 11 cubic feet of additional packing space
- Rugged and durable design keep contents protected
- FastGrip quick-mount system assembles in minutes
- Passenger-side opening for easy loading and unloading
- Central Locking system provides maximum safety
Choosing the Perfect Car Roof Box: Your Complete Buying Guide
A car roof box is a fantastic way to add extra storage to your vehicle. Whether you are heading on a long road trip, a skiing adventure, or just need more room for family gear, a roof box frees up space inside your car. Picking the right one can seem tricky, but this guide breaks down what you need to know.
Key Features to Look For
When shopping for a roof box, look closely at these important features. They make a big difference in how useful and safe the box is.
Capacity and Size
- Volume (Liters): Roof boxes come in many sizes, usually measured in liters. A small box might hold 10 cubic feet of stuff. A large box can hold 20 cubic feet or more. Think about what you usually carry. Ski gear needs more length; camping gear needs more volume.
- Length and Width: Make sure the box fits your car’s roof rack system. Measure your roof space before buying.
Ease of Installation and Access
- Mounting System: How easily does the box attach to your car’s crossbars? Quick-lock systems are usually the fastest and safest.
- Opening Mechanism: Most modern boxes open from one side or both sides (dual-side opening). Dual-side opening is very helpful. You can reach your gear easily from either side of the car.
Security and Durability
- Locking System: A good box must have strong locks. Look for boxes with central locking systems that lock all latches at once.
- Weatherproofing: The box must keep your belongings dry. Check reviews for how well the seals hold up in heavy rain.
Important Materials: What Makes a Good Box?
The material affects the box’s weight, strength, and cost.
ABS Plastic (Acrylonitrile Butadiene Styrene)
This is the most common material. ABS plastic is light and strong. It resists dents well. High-quality ABS plastic lasts for many years.
Fiberglass
Fiberglass boxes are often very tough and aerodynamic. They sometimes cost more money. They offer excellent protection against weather.
Factors That Improve or Reduce Quality
Quality isn’t just about the material; it’s about the design.
Aerodynamics (Better Quality)
A sleek, low-profile shape cuts through the wind better. Good aerodynamics reduce wind noise inside the car. They also help maintain better gas mileage. Boxes with rounded edges perform better than square ones.
Weight Capacity (Important Safety Factor)
Always check the maximum weight your box can safely carry. Also, check your car manufacturer’s recommended roof load limit. Exceeding this limit is dangerous and can damage your car.
UV Resistance (Reduces Quality Loss Over Time)
If the plastic is not treated for UV rays, the sun will make it brittle over time. Good boxes use UV-resistant coatings so the color stays vibrant and the plastic does not crack.
User Experience and Use Cases
How you plan to use the box influences your choice.
- Weekend Trips: A medium-sized, easy-to-mount box works well for short trips and luggage.
- Outdoor Sports: If you carry skis, snowboards, or fishing rods, you need a long, slim box. These are often called “cargo carriers” or “ski boxes.”
- Daily Driving: Some drivers leave the box on all the time. If so, choose a box that is very quiet and fuel-efficient.
Remember to check local regulations about how far the box can stick out past your license plate.
10 Frequently Asked Questions (FAQ) About Car Roof Boxes
Q: How much does a car roof box affect my gas mileage?
A: A roof box usually lowers your gas mileage by 5% to 20%. This depends on its size, how fast you drive, and how aerodynamic the box is. Driving slower helps save gas.
Q: Can I wash my roof box in an automatic car wash?
A: No, you should never take your car through an automatic car wash with the roof box attached. The brushes and high-pressure jets can damage the box or pull it off the rack.
Q: What is the difference between a roof box and roof cargo bags?
A: Roof boxes are hard-sided, offering better security and weather protection. Cargo bags are soft-sided, cheaper, and easier to store when empty, but they offer less protection.
Q: Do I need roof rails before I buy a box?
A: Yes. Most roof boxes attach to crossbars. Crossbars attach to your car’s existing side rails (if your car has them) or directly to the car roof channels.
Q: How difficult is it to install a roof box by myself?
A: For smaller boxes, one person can often manage the installation. Larger, heavier boxes are much easier and safer to install with two people.
Q: What is the typical lifespan of a good quality roof box?
A: A high-quality ABS plastic or fiberglass roof box, when cared for properly, can last 10 to 15 years or more.
Q: Can I open the trunk/boot with the roof box installed?
A: Usually, yes. However, if you have a very short roof (like on a small hatchback), a very long box might block the opening of your rear hatch. Measure carefully!
Q: Should I buy a matte or glossy finish box?
A: Glossy boxes look shinier, but matte finishes tend to hide small scratches and swirl marks better over time.
Q: What is the best way to pack items inside the roof box?
A: Pack heavy items toward the center and closer to the roof rack bars. This keeps the weight balanced and reduces strain on the box clips.
Q: Are roof boxes waterproof or just water-resistant?
A: Most reputable boxes are designed to be waterproof. They use tight seals and overlapping lids to prevent water entry, even during heavy downpours.