Thule Force 3 XL US roof cargo box — extra-large capacity, dual-side access, tool-free mounting

Built for everyday use and long drives alike, the Thule Force 3 XL US combines a hard-shell design with user-friendly features so you can carry more gear without sacrificing style or safety. Its streamlined shape reduces wind noise and drag while the robust construction resists scratches and fading. Engineered and extensively tested by Thule, this box balances volume with practical handling for bikes, luggage, camping equipment, and seasonal gear.

How does the Thule Force 3 XL US attach to my vehicle?

Mounting uses an intuitive, quick-fit system that secures the box to most crossbars without tools. The mechanism clicks to confirm proper attachment and is designed to distribute load evenly across your roof bars.

• Quick-mount clamps lock onto factory or aftermarket crossbars
• Click indicators show when the box is securely attached
• Tool-free installation saves time when packing or removing the box

What access and security features does it offer?

Access is available from both sides of the vehicle, so loading and unloading are more convenient at curbside. The SlideLock system separates locking and opening functions and automatically locks the lid when closed, making it simple to secure your belongings.

• Dual-side opening for easy loading from either side of the car
• SlideLock prevents accidental opening and confirms closed position
• Separate keyed lock keeps contents protected while away from the vehicle

How durable and road-ready is this cargo box?

Thule designs each Force model to withstand everyday wear and extended exposure to the elements. The materials are chosen to retain a sleek appearance while resisting dents, UV damage, and abrasion during regular use.

• Hard-shell exterior resists impacts and road debris
• UV-stable finish preserves color and reduces aging
• Tested in Thule’s labs for safety and long-term durability

Will it fit my gear and still be aerodynamic?

The Force 3 XL US offers a generous volume for larger loads while maintaining a tapered profile to help reduce drag. Its internal shape accommodates bulky items and soft bags, and the exterior is sculpted to minimize wind resistance and noise.

• Extra-large capacity suits longer trips and family gear
• Streamlined design lowers wind noise compared with bulkier boxes
• Internal space fits suitcases, duffels, sleeping bags, and more

Who is this for: The Thule Force 3 XL US is ideal for active households, weekend campers, ski and snowboard enthusiasts, or anyone who needs substantial, secure rooftop storage without complicated installation. It’s designed for drivers who want a durable, low-maintenance cargo solution that’s easy to load from either side and trusted for long-distance travel.