10 Best Car Top Carriers 2026 in the United States

The Thule Force 3 XXL is a spacious and durable car-top carrier with a 21 cubic feet capacity, making it a great choice for families or anyone needing extra storage for trips. Its large dimensions (about 91 x 35 x 18 inches) provide plenty of room for gear, but at nearly 53 pounds, it’s fairly heavy, so handling it might require some effort. Made from sturdy plastic, the box is weather-resistant, helping to keep your belongings dry during rain or snow.

One strong point is its aerodynamic design, which helps reduce wind noise and drag compared to bulkier cargo boxes. Installation is user-friendly thanks to a tool-free mounting system that clearly indicates when the box is securely locked onto your roof, which is a big convenience for those who frequently load and unload. You can access your cargo from either side, which is handy in tight parking spots or when loading on the curb side.

Security is solid with the SlideLock system that locks automatically and shows if the lid is securely closed, but like most roof boxes, it’s best to use it in combination with other vehicle security measures. This box fits a wide range of vehicles including SUVs, trucks, cars, and EVs, making it versatile. Its large size and weight could be less ideal for those who want something lighter or more compact. It is well suited for active drivers who need durable, ample storage space with ease of use and strong security features.

The Thule Motion 3 XXL is a large rooftop cargo box offering 21 cubic feet of storage, ideal for families or anyone needing extra space for trips. It can hold up to 165 pounds, supporting a substantial load for gear or luggage. Made from durable aluminum, it’s sturdy but relatively heavy at 35 kilograms.

Its wing-shaped, aerodynamic design helps reduce wind drag, potentially improving fuel efficiency compared to bulkier boxes. The box mounts easily with the PowerClick quick-mount system, which clicks to confirm secure installation—this tool-free setup is user-friendly, especially for those new to roof boxes. Opening and closing is smooth and can be done with one hand thanks to the wide handle. Security is enhanced with the SlideLock system, which automatically locks the lid and shows when it’s secured, helping keep belongings safe.

However, it is not water resistant, so it is advisable to avoid heavy rain or snow conditions or consider additional protective liners (available as accessories). Its large size means it might not fit all car roofs or low-clearance garages comfortably. This cargo box is suitable for users who prioritize easy mounting, good security, aerodynamic design, and plenty of capacity, while considering its weight and lack of water resistance when planning trips.

The Thule Motion 3 XXL is a spacious rooftop cargo carrier offering 21 cubic feet of storage, making it a great option for families or travelers needing extra gear space. Its wing-shaped design with a forward-leaning nose helps reduce wind resistance, which can improve your vehicle's fuel efficiency compared to boxier carriers. Made from durable aluminum, it promises good longevity and water resistance, protecting your belongings from the elements.

The PowerClick quick-mount system simplifies installation by providing a clear click sound when securely attached, which is convenient for fast and safe mounting without guesswork. Security is also well-covered by the SlideLock system, which separately locks and unlocks the lid and visually confirms when the cargo box is securely closed. The sturdy lid and wide handle allow for smooth one-handed opening and closing, adding to user comfort. The carrier is universally compatible with most roof racks, making it flexible for different vehicles.

Additional accessories like an interior light and protective liners can be purchased separately, which might be useful but add to the overall cost. Although it is positioned at a higher price point typical for Thule products, those prioritizing aerodynamic design, easy mounting, and solid security features will find the Thule Motion 3 XXL to be a strong contender.