10 Best Rooftop Cargo Boxes 2026 in the United States

The Thule Motion 3 XXL rooftop cargo box is an excellent choice for those needing a large, durable storage solution for road trips or outdoor gear. It offers a roomy 21 cubic feet of space, capable of carrying up to 165 pounds, which makes it suitable for bulky items like camping equipment or luggage. The aluminum construction provides strength and a premium feel, although it is not fully water resistant, so it is best suited for dry or light weather conditions.

Its aerodynamic, wing-shaped design helps reduce wind drag, potentially improving fuel efficiency compared to boxier models. Mounting the box is hassle-free thanks to the PowerClick quick-mount system, which signals when the box is securely attached, offering a tool-free setup that is convenient for occasional users. The lid opens and closes smoothly with one hand, aided by a wide handle, simplifying loading and unloading. Security is enhanced with the SlideLock system that locks the lid tightly and clearly indicates when it’s secured, providing peace of mind when leaving your vehicle unattended.

Additional features such as optional interior lighting and protective liners enhance usability but may increase the overall cost. The cargo box is relatively heavy (about 35 kg), which may make installation challenging for one person. While it does not offer full water resistance, it is solidly built and comes with a limited lifetime warranty. This rooftop carrier is ideal for travelers and families seeking a spacious, secure, and sleek storage solution with easy mounting and access; however, those frequently driving in heavy rain or requiring complete waterproofing might prefer other options.

The Thule Motion 3 XL rooftop cargo box is a strong contender for those looking for extra storage space while traveling. Its wing-shaped profile and forward-leaning nose design help reduce drag, which can contribute to better fuel efficiency—an important factor for long road trips. With a sturdy build made from aluminum, this cargo box offers durability and a weight capacity suitable for a range of items. The easy-to-use PowerClick quick-mount system with an integrated torque indicator makes installation simple and secure, a definite plus for users who might find rooftop mounting challenging.

Accessibility is well thought out, as the box features a wide handle that allows you to open and close it easily with one hand. It also has a SlideLock system that not only secures the lid but also indicates when it’s properly closed, giving peace of mind about safety.

A notable downside is that this box is not water-resistant, which could be a concern for those traveling in wet conditions or looking to store items that need protection from rain. Additionally, while the cargo box is spacious, its weight of 23 kilograms might be heavy for some users to lift onto their vehicles.

The SportRack Vista XL Rear Opening Cargo Box is a spacious rooftop cargo box with an internal capacity of 18 cubic feet (510 liters), making it suitable for large families or individuals needing extra storage for trips. Its maximum weight capacity is 100 pounds (45 kg), which should suffice for most typical luggage. The cargo box is made from durable, UV-resistant ABS material, providing longevity and resistance against the elements. Its rear opening design makes accessing items easy and safer, as you don't have to be near traffic when opening it.

The tool-free mounting hardware simplifies installation and removal, making it user-friendly for those who may not be technically inclined. Additionally, the cargo box includes a key and lock system to secure contents and prevent theft, adding a layer of security for peace of mind. It fits various rack systems, including square, round, and most factory racks, ensuring versatility in mounting options.

The aerodynamics of the box are not explicitly mentioned, but the streamlined shape likely contributes to reduced wind resistance and noise. However, users should be aware of the dimensions (63 x 38 x 19 inches) and ensure their vehicle can accommodate its size without obstructing other functions or visibility. At 28 pounds, it's relatively lightweight but sturdy. This cargo box is an excellent choice for those seeking a durable, spacious, and secure storage solution for their vehicle.