10 Best Rooftop Cargo Boxes 2026 in the United States

The Thule Force 3 L US rooftop cargo box is a solid choice for anyone looking to increase their vehicle’s storage space, especially if you lead an active lifestyle. It offers a generous 16 cubic feet of capacity, which is roomy enough to hold gear for road trips, sports equipment, or camping supplies. Weighing around 36 pounds, it’s not the lightest box but still manageable for most users. Made from durable plastic, it’s designed to withstand everyday use and various weather conditions, with water-resistant protection to keep your belongings dry.

Its aerodynamic shape helps reduce wind resistance and noise while driving, which can make long trips more comfortable. The mounting system stands out for being quick and secure, featuring a simple click to let you know the box is properly attached. Plus, you can load and unload gear from both sides of the vehicle, which is a big convenience when parking tight or loading with others.

Security is well-covered with the SlideLock system, which automatically locks the lid and clearly signals when it’s secure, giving peace of mind that your cargo is safe. While it’s a bit heavier than some other models, this trade-off comes with greater durability and strong build quality. This cargo box works well for families, outdoor enthusiasts, and anyone needing extra storage without sacrificing ease of use or security.

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.