10 Best Roof Cargo Boxes 2026 in the United States

The Thule Force 3 is a robust choice for those in need of a large capacity roof cargo box. With its generous 21 cubic feet of storage, it is ideal for families or individuals requiring substantial space for road trips or outdoor activities. The box is designed to be aerodynamic, which should help minimize wind resistance and noise when driving. Made from durable plastic, the box is built to withstand daily wear and tear, making it suitable for active lifestyles and different weather conditions.

One of its standout features is the dual-sided opening, allowing for easy access from either side of the vehicle, a convenient option when packing or unpacking your cargo. The quick and intuitive mounting system ensures the box is securely attached and provides a clear indication when correctly mounted, making installation straightforward even for those not mechanically inclined.

Security is well-handled with the SlideLock system, which separates the locking and opening functions, ensuring that the lid is securely closed and locked, providing peace of mind during travel. Additionally, the unit's weatherproof design protects contents from the elements. However, at 53.5 pounds, it is on the heavier side, which might require some assistance during installation. Given its features, it’s best suited for SUVs, trucks, and larger vehicles, though its size might be overkill for smaller cars with less roof space.

In conclusion, the Thule Force 3 seems well-designed for those who need a reliable and spacious roof cargo solution, but potential buyers should consider their vehicle's compatibility with its size and weight.

The Thule Force 3 XL is a spacious roof cargo box offering 18 cubic feet of storage, making it a great choice for families or active users needing extra room on their SUV, truck, car, or even electric vehicle. Weighing 66 pounds, it’s relatively lightweight for its size, which helps with easier handling during installation. Made from durable plastic, it’s designed to withstand daily use and various weather conditions, although it's water-resistant rather than fully waterproof, so heavy rain might still be a consideration.

One standout feature is its aerodynamic shape, which helps reduce wind noise and drag, potentially improving fuel efficiency compared to bulkier boxes. The mounting system is user-friendly and tool-free, with a clear click indicator to confirm the box is securely attached — this makes setup fast and reassuring. Dual-sided opening is a big convenience plus, allowing access to your gear from either side of the vehicle without having to unload everything.

Security is well thought out with the SlideLock system, which automatically locks the lid and visually confirms when it’s securely closed, giving peace of mind when leaving your belongings unattended. The Thule Force 3 XL is well-suited for anyone looking for a reliable, easy-to-use, and spacious hard-shell roof box with smart security and practical accessibility. It balances durability and convenience effectively, though those frequently driving in very wet climates might want to consider its water resistance level.

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.