Thule Force XT L/XL/XXL Rooftop Cargo Box Review

If you know something about rooftop cargo boxes you probably have heard about Thule – it’s on of the most reputable companies that makes rooftop cargo boxes and other types of equipment. Naturally expectations for Thule Force XT Large rooftop cargo box are set high – so does it stand up to them?


Thule Force XT Large rooftop cargo box provides you with extra 16 cubic feet of storage space and can carry up to 165 pounds of luggage. It is very spacious – there are bigger versions available of this model but this one provides enough storage space needed for most consumers.

Inside the cargo box you will find 6 sturdy metal tie down points that allows you secure loose belongings and keep them in place with 3 cam buckled nylon straps that are included.


Installation is very simple,takes only few minutes to complete and doesn’t require any tools. Mounting system is genius: clamps that secure cargo box to the crossbar have integrated torque indicator that clicks when you have tightened them enough – so you will never have to second guess whether you tightened them enough or worry about overtightening.

This system also works very good too – box is attached really securely and there is absolutely 0 doubts it will stay there.


Doesn’t feel as sturdy as you might expect – not that it’s fragile but shell could be thicker and stronger. It’s definitely strong enough for the purpose its made and this is a really minor complaint for but for the price you might have expected a unit that’s more solid.

Under the cargo box you will find metal reinforcements which makes the whole unit a lot more rigid and solid.

If there is something you can actually complain about it’s the key latch which is also made from plastic. It feels very cheap and unlocking/locking feels a bit finicky.


Thule Force XT can be opened from both sides and doesn’t block trunk from opening. It also has narrow design which will allow you to mount bikes, skis or other stuff alongside.


On the first glance it seems it might not be waterproof but despite that it seems to stay dry during heavy rain.

That being said no matter how waterproof device is there is always, even if the slimmest, but still nonetheless a chance for water to get inside for one reason or another. In regard of Thule Force XT such a chance really does seem to be minuscule .

Mileage and noise

It seems to be very aerodynamic because it doesn’t decrease mileage or create as much noise as most other rooftop cargo boxes and bags.

Dimensions and weight

Thule Force XT L weighs 32 pounds. On the outside it’s 74.75” long, 24.75” wide and 16.75” high, on inside – 70.5” long, 20.5” wide and 14.75” high.


If you are looking for a hard-shell rooftop cargo box then Thule Force XT is a great choice. It has some minor flaws but overall it’s a really good unit.

Other Thule Force XT versions

Other variations of Thule Force XT are pretty much the same with only significant differences being storage capacity, weight and dimensions:

  • Thule Force XT XLL
    • Storage capacity: 22 cu. ft.
    • Weight: 52 lbs
    • External dimensions: 90.5″ x 35.5″ x 18.5″
    • Internal dimensions: 85.5″ x 31″ x 16.75″
    • Check Price

  • Thule Force XT XL
    • Storage capacity: 18 cu. ft.
    • Weight: 47 lbs
    • External dimensions: 82.75″ x 33.75″ x 17.25″
    • Internal dimensions: 77.5″ x 29.5″ x 15.25″
    • Check Price

  • Thule Force XT Sport
    • Storage capacity: 11 cu. ft.
    • Weight: 32 lbs
    • External dimensions: 74.75″ x 24.75″ x 16.75″
    • Internal dimensions: 70.5″ x 20.5″ x 14.75″

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