10 Best Car Top Carriers 2026 in the United States

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 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 SportRack Vista XL Rear Opening Cargo Box offers ample storage capacity with its 18 cubic feet of internal space, making it suitable for long trips or family vacations. Its dimensions (63 x 38 x 19 inches) provide a substantial amount of space without being excessively bulky. Despite its large capacity, the cargo box is relatively lightweight at 28 pounds, which makes it easier to handle and install. The box is made from durable UV-resistant ABS plastic, ensuring it withstands harsh weather conditions and long-term exposure to sunlight without degrading. Its rear opening design allows for easy access to contents without needing to stand in traffic, which is a thoughtful safety feature.

The tool-free mounting hardware simplifies installation and removal, catering to users who may not be very handy with tools. It fits various rack systems, including SportRack Rack Systems, square bars, round bars, and most factory racks, making it versatile and compatible with many vehicles. The maximum weight capacity of 100 pounds ensures it can carry a substantial load, though users should be mindful not to exceed this limit to maintain safety. The inclusion of a key and lock adds a layer of security, protecting the contents and securing the box to the rack.

However, some users might find the rear opening a bit cumbersome as it might require more space to fully open in certain situations. Additionally, while the aerodynamics of the box are decent, some users may notice a slight increase in wind resistance and noise during travel. The SportRack Vista XL is a solid choice for those needing extra storage space on their vehicle.