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 XXL Low is a great choice if you need a large rooftop cargo box with plenty of storage space, offering 18 cubic feet of volume. Its wing-shaped, forward-leaning design helps reduce wind drag, which can improve your car’s fuel efficiency during travel. The box is made from aluminum, making it sturdy and durable, though it is not water resistant, so it might not fully protect your belongings in heavy rain.

Weighing 25.4 kilograms, it’s on the heavier side but still manageable considering its size. Mounting the box is straightforward thanks to Thule’s PowerClick system, which gives a clear click when securely attached, making setup fast and secure without extra hassle. The wide handle allows you to open and close the lid smoothly with one hand, and the SlideLock system provides good security by locking the lid automatically and showing when it’s safely closed.

Optional accessories like an interior light and protective liners add convenience but come separately. This cargo box suits those who want a spacious, well-designed carrier that balances easy handling with secure attachment. However, if you frequently drive in wet conditions, you might want to consider a fully waterproof model.

The Thule Force 3 XXL US is a sizable rooftop cargo box offering 21 cubic feet of space, making it a strong choice for families or outdoor enthusiasts needing extra room for gear. Weighing about 53 pounds, it’s somewhat heavy, so keep that in mind when lifting it onto your vehicle’s roof. Made of durable plastic, it’s built to withstand daily use and rough conditions, promising long-lasting protection for your belongings. The design is sleek, which helps reduce wind drag while driving, contributing to better aerodynamics and potentially less noise on the road.

One of the standout features is its mounting system: it’s quick and intuitive, with a clear click to show when the box is securely attached. This makes installation straightforward, even for those new to rooftop boxes. Accessibility is well thought out, with doors on both sides of the vehicle, so you can reach your items easily without having to move around the car. Security is enhanced by the SlideLock system, which automatically locks the lid and indicates when it’s securely closed, giving peace of mind during travel.

The box is water-resistant but not fully waterproof, so it should protect gear well in most wet conditions but might not be suited for heavy rainstorms. Its universal fit means it works with most roof racks, but always double-check compatibility with your vehicle. The size and features make it excellent for active lifestyles and frequent travelers, though the relatively heavy weight and plastic shell may be less appealing if you prioritize ultra-light or metal options. The Thule Force 3 XXL offers a balanced combination of capacity, convenience, and security for those needing reliable rooftop cargo space.