10 Best Rooftop Cargo Boxes 2026 in the United States

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.

The Thule Force 3 in size XL offers a spacious 18 cubic feet capacity, making it a great choice if you need extra room for luggage or gear on trips, especially for SUVs, trucks, cars, and EVs. It weighs 66 pounds, which is fairly typical for a hard-shell cargo box and balances durability with manageable weight. Made from sturdy plastic, it promises durability and weather resistance to protect your belongings in various conditions, though it’s described as water-resistant rather than fully waterproof. Its aerodynamic design helps reduce wind noise and drag, which is beneficial for fuel efficiency and quieter rides.

The mounting system is user-friendly and tool-free, featuring a clear click indicator to ensure the box is securely attached, which is helpful for quick installation without hassle. Accessibility is enhanced by dual-sided opening, letting you reach your cargo from either side of the vehicle—this is especially convenient in tight parking spots. Security is thoughtfully addressed with Thule’s SlideLock system that automatically locks the lid and shows a clear indicator when it’s secure, giving peace of mind against theft.

The box is well-built and tested for road safety, but the water resistance level suggests caution in heavy rain or deep puddles. Its size and weight mean it requires some effort to mount and remove, so it might not be ideal for those seeking ultra-light or very compact options. This cargo box is suited for active users looking for a durable, spacious, and easy-to-use rooftop storage solution with good security and weather protection.

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.