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 Force 3 XL is a hard-shell roof-mounted cargo box offering a spacious 18 cubic feet of storage, making it suitable for SUVs, trucks, cars, and electric vehicles. Its large dimensions (about 85 x 34 x 18.5 inches) provide ample room for luggage, camping gear, or sports equipment. Weighing 66 pounds and made from durable plastic, it promises good resistance to daily wear and weather, keeping your belongings dry and protected. The aerodynamic design helps reduce wind noise and drag, which can improve fuel efficiency compared to less streamlined boxes.

Installation is user-friendly thanks to a tool-free mounting system that clicks into place and confirms secure attachment, making it easy to fit or remove even for beginners. One standout feature is the dual-sided opening, giving you convenient access from either side of your vehicle, which is especially handy in tight parking spots. Security is thoughtfully addressed with Thule's SlideLock system that both locks the lid and shows clearly when the box is securely closed.

The product's weight might be a bit heavy for some users to handle during installation, and while it is water-resistant, it does not claim full waterproofing, so very heavy rain might be a concern. With a relatively high price point, you may want to consider if these features match your budget and needs. The Thule Force 3 XL is a reliable and convenient choice for active users needing a weatherproof, secure, and easy-to-use car-top carrier with generous space.

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.