Thule Force 3 XXL Roof Cargo Box — Extra-Large Capacity, Dual-Side Opening & SlideLock Security

The Thule Force 3 XXL US is a large, roof-mounted cargo box that adds durable, secure storage to your vehicle while allowing easy access from either side.

Designed for everyday use and active lifestyles, the Thule Force 3 XXL US combines a streamlined profile with rugged construction so you can carry bulky gear without sacrificing style or safety. Its mounting and locking systems are engineered for quick installation and clear confirmation that the box is properly attached and locked, and the unit has been rigorously tested in Thule’s lab to meet real-world road demands.

How easy is it to mount and remove the Thule Force 3 XXL US?

Mounting is fast and intuitive thanks to a secure quick-mounting system that clicks when the box is correctly positioned. The mechanism minimizes tools and time, making it practical for weekend trips or daily use.

• Quick-mount clamps with audible click to confirm attachment
• Tool-free or minimal-tool installation on compatible crossbars
• Stable fit designed to reduce movement and vibration on the road

Can I access my gear from both sides of the vehicle?

Yes — the Thule Force 3 XXL US offers dual-side opening for convenient loading and unloading from either side of the car. This feature saves time in tight parking spaces and allows flexible packing arrangements.

• Left- and right-side lid opening for easier reach
• Wide lid opening to accommodate large or irregular-shaped items
• Ergonomic handles designed for smooth operation when loading

What security features protect my cargo?

The unit uses Thule’s SlideLock system that automatically locks the lid and separates locking from opening for added safety. Visual indicators let you know when the box is securely closed and locked so you can hit the road with confidence.

• SlideLock with separate lock and open functions for tamper-resistant closure
• Automatic locking when the lid is closed to prevent accidental openings
• Visual lock indicators for quick confirmation at a glance

How durable and road-ready is this roof box?

Built to withstand daily use, the Force 3 XXL US keeps a clean, aerodynamic look while resisting wear from the elements. Thule’s in-house testing validates performance under variable conditions so the box stays reliable trip after trip.

• Robust shell that maintains shape and finish during regular use
• Designed to reduce wind drag and road noise
• Extensively tested in Thule Test Center for safety and longevity

Who is this for? The Thule Force 3 XXL US is ideal for families, outdoor enthusiasts, and commuters who need large-capacity roof storage without compromising security or convenience. If you frequently transport skis, camping gear, suitcases, or bulky purchases and want a robust, easy-to-use solution that integrates with most crossbar systems, this box is built to meet those needs.