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 Motion 3 LTitan is designed for users looking for a reliable and efficient car-top carrier. One of its standout features is its aerodynamic wing-shaped profile, which reduces drag and contributes to better fuel efficiency—ideal for long trips. The sturdy lid design allows for easy one-handed operation, making loading and unloading a breeze. The PowerClick quick-mount system ensures a secure fit, with an audible ‘click’ that signals when it's properly attached, a comforting feature for those who may be new to mounting roof boxes.

In terms of capacity, this large carrier offers ample storage with a volume of 450 liters, suitable for families or anyone needing extra space for gear. It’s made from durable aluminum, promising longevity and good water resistance to protect your belongings from the elements.

On the downside, the weight capacity at 24.04 kilograms might limit how much you can pack, especially if you have bulky items. Some users might find the size a bit cumbersome, making it challenging to handle without assistance when not mounted on the vehicle. Additionally, while the SlideLock system provides added security, it’s crucial to ensure that the lid is locked correctly, as mishaps can occur if not checked. This product suits families and outdoor enthusiasts needing extra space for their adventures, balancing performance with user-friendly 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.