10 Best Roof Cargo Boxes 2026 in the United States

The Thule Motion 3 XXL rooftop cargo box offers a spacious 21 cubic feet of storage, making it ideal for families or travelers needing extra room for luggage or gear. It supports up to 165 pounds, which is sufficient for most vehicle roof racks without risking damage. The box is made from durable aluminum, ensuring solid protection for your items. However, since it is not water resistant, users should be mindful when driving in heavy rain to keep valuables dry.

Its aerodynamic, wing-shaped design helps reduce wind drag and may improve fuel efficiency compared to bulkier boxes. Mounting is a standout feature with the PowerClick quick-mount system that confirms secure attachment through a torque indicator click, allowing for tool-free and fast installation. Opening and closing is smooth and user-friendly due to its wide handle and one-handed operation. The SlideLock system adds security by locking the lid and providing visual confirmation that it’s closed properly.

Although the box is large and robust, it weighs around 35 kilograms, so handling it alone can be challenging when loading or removing. Accessories such as interior lighting and protective liners enhance convenience but are sold separately. This cargo box is well suited for users seeking a reliable, easy-to-use, and roomy carrier with solid security for road trips and outdoor adventures.

The Yakima SkyBox NX Extra-Large Cargo Carrier Box offers a spacious solution for transporting gear with 18 cubic feet of capacity, making it ideal for families or group trips. Its dual-sided opening is convenient, allowing access from either side of your vehicle, which makes loading and unloading easier. The removable torque limiting knob ensures a secure installation, while integrated tie down points help keep your belongings in place during transit. Additionally, the included SKS locks provide an extra layer of security, ensuring that your gear is safe from theft.

The stylish NX nano texture on both the lid and base gives it a sleek, modern look, enhancing your vehicle's aesthetic as well. The box fits all Yakima StreamLine crossbars and most factory or aerodynamic crossbars, adding to its versatility. The box also offers optimized hatch clearance, ensuring it fits snugly without obstructing access to the car's trunk. However, the product is made of plastic, which might not be as durable as some metal counterparts. It is also not water-resistant, which could be an issue in wet weather conditions. Weighing 53 pounds, it may be slightly heavy for some users to manage alone.

The Thule Motion 3 LTitan is a strong contender in the roof cargo box category, particularly for those needing a spacious and durable solution for transporting gear. With a volume of 450 liters, it offers ample storage for large items, making it ideal for families or outdoor enthusiasts who need extra space for luggage or equipment. The sturdy aluminum build ensures durability while remaining relatively lightweight at about 24 kg, which is beneficial for mounting and handling.

One of the standout features is its aerodynamic design, which not only reduces drag but also helps improve fuel efficiency—a significant plus for longer trips. The PowerClick quick-mount system allows for easy installation, and the integrated torque indicator provides reassurance that it’s securely fitted. Additionally, the SlideLock system enhances security, ensuring the lid locks automatically while providing a clear indication that it’s properly closed.

The Thule Motion 3 LTitan is well-suited for individuals or families looking for a reliable and spacious roof cargo box. Its user-friendly features and solid build make it appealing.