The catch
Thule Motion 3 XL
Compared with Force, the selected glossy shell adds neither ski length nor cargo rating.
Side by side
Motion 3 XL is the pick if your car meets its shorter hatch-clearance requirement or your garage height is tight. If both boxes fit, Force 3 XL wins on its matte finish and lower published empty weight. The two share a 200 cm ski limit and a 165 lb box load limit, always subject to the vehicle and rack limits.
Before you buy
Measure 53 inches from the front crossbar to the roof-hatch junction and Motion is the candidate, while Force misses the published threshold. That matters if the rear door has to open for a stroller or dog crate. When both cars in the household will share the box, repeat the measurement on each before you pay for the convenience of swapping it between them.
Where this comes from
For Motion, Thule requires a measurement greater than 52.125 inches, and for Force, 53.0625 inches. In the example, that is 0.875 inch above Motion's threshold and 0.0625 inch below Force's. It assumes compatible crossbars in an approved position, and it is a fit screen and not vehicle certification.
The catch
Compared with Force, the selected glossy shell adds neither ski length nor cargo rating.
The catch
More front clearance is needed, and that can rule it out on a car that accepts Motion.


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Before you pick a box for family luggage or skis, weigh Motion 3 XL against Force 3 XL on hatch access, garage height and roof payload.
Motion 3 XL is the pick if your car meets its shorter hatch-clearance requirement or your garage height is tight. If both boxes fit, Force 3 XL wins on its matte finish and lower published empty weight. The two share a 200 cm ski limit and a 165 lb box load limit, always subject to the vehicle and rack limits.
Which one fits
At this measurement, the strict greater-than rule in the fit chart admits Motion and rules out Force. Fixed bars should not be repositioned without vehicle and rack approval.
Nominal totals come to 85 and 85.8 inches. The Motion estimate leaves only 0.5 inch, so a physical measurement and a suitable margin are still essential.
A 200 cm maximum is published for both. A different shell finish or nominal volume does not extend the approved ski length.
Totals reach 171 and 169 lb even with the lower published empty weights. Neither box handles this particular load.
Force offers the preferred finish with the same side-opening and locking features. The finish alone does not establish a durability winner.
In practice
Measure 53 inches from the front crossbar to the roof-hatch junction and Motion is the candidate, while Force misses the published threshold. That matters if the rear door has to open for a stroller or dog crate. When both cars in the household will share the box, repeat the measurement on each before you pay for the convenience of swapping it between them.
For Motion, Thule requires a measurement greater than 52.125 inches, and for Force, 53.0625 inches. In the example, that is 0.875 inch above Motion's threshold and 0.0625 inch below Force's. It assumes compatible crossbars in an approved position, and it is a fit screen and not vehicle certification.
With crossbars 70 inches above the ground, the published estimates come to 85 inches with Motion and 85.8 inches with Force. An 85.5-inch opening leaves Motion as the only candidate for a physical clearance check. A half-inch estimated margin is too small to count as permission to drive in without measuring the installed box.
Take an assumed ground-to-crossbar height of 70 inches and add the manufacturer height above the crossbar: 70 + 15 = 85 and 70 + 15.8 = 85.8. Before use, compare the highest installed point with the actual lowest garage obstruction, door included. Conflicting overall-shell heights are not used in the estimate.
Picture an illustrative 165-pound-rated roof carrying a 20-pound rack. Even then, 100 pounds of luggage is already too much for either box. Choose lighter cargo or a different transport arrangement, because moving from Motion to Force cannot rescue this load, even with the lower published box weights.
Rack, box and cargo are added together, as both manuals require. With the lower product-page weights, that is 20 + 51 + 100 = 171 pounds for Motion and 20 + 49 + 100 = 169 for Force. Each total goes over the assumed 165-pound roof limit, and a lower rack limit can restrict loading even more.

Thule, Motion 3 XL Black Glossy
Capacity is 18 cubic feet, and gear up to 200 centimeters long fits inside.

Thule, Force 3 XL
This box has 18 cubic feet of space and takes gear up to 200 centimeters long.
Spec by spec
| Spec | Thule Motion 3 XL | Thule Force 3 XL | In practice |
|---|---|---|---|
| Front-bar-to-hatch requirement | More than 52 1/8 in in the US fit chart | More than 53 1/16 in in the US fit chart | The Motion threshold is cleared by a 53-inch measurement, while the Force threshold is failed. Confirm approved bar positions and the actual hatch movement. |
| Crossbar spread | 21 13/16 to 36 9/16 in in the fit chart | 21 7/8 to 36 5/8 in in the fit chart | On fixed-position bars, both ends count. If you move a rack to gain hatch clearance, it still has to keep an approved spread and vehicle mounting position. |
| Published height above crossbar | 15 in | 15.8 in | For an initial garage screen, measure from the ground to the top of the crossbar and add this value. Before driving underneath, measure the installed assembly. |
| Box cargo and vehicle load | 165 lb box cargo limit, with rack and box also counted against the roof limit | 165 lb box cargo limit, with rack and box also counted against the roof limit | Long before either box hits its own cargo rating, the roof can become the lower limit. |
| Published empty weight | 51 lb on the product page, 52.7 lb in the manual | 49 lb on the product page, 49.6 lb in the manual | Force comes out lower in both documents, yet the conflicting figures rule out a precise lifting or maximum-payload advantage. Confirm the specification of the unit delivered. |
| Ski length and loading access | Up to 200 cm skis, dual-side opening, PowerClick and SlideLock | Up to 200 cm skis, dual-side opening, PowerClick and SlideLock | Switching between these XL boxes neither solves a 205 cm ski requirement nor adds a new side-opening function. |
| Selected shell finish | Black glossy, model 639850 | Black matte, model 645850 | Once fit is settled, finish comes down to preference. No measured noise, fuel-saving or scratch-resistance advantage is inferred. |
Trade-offs
Change of plan
Go with Thule Motion 3 XL. At this measurement, Motion passes the published clearance threshold. Force needs more than 53 1/16 inches.
Go with Thule Force 3 XL. Black matte is the finish of the selected Force 3 XL, which keeps dual-side access, PowerClick mounting and SlideLock.
Neither model fits. The published maximum ski length is the same 200 cm on both models.
Decision guide
What you gain here is a better fit on your actual car. If the rear door has to swing fully open for a stroller, a dog or a loading shelf, front clearance matters a great deal. When you measure, have the current chart and the rack's approved mounting positions side by side. Any second car needs its own check, even with the same crossbar brand.
Having a garage can alter how you live with the box. When the loaded vehicle will not fit inside, you may have to unload and take the box off outside after every trip. Motion's lower published height relative to the crossbars is a useful first screen. For a low opening, a few tenths of an inch on paper will not settle it, so measure the real assembly and the lowest obstruction.
Gear that fills up space before it uses up the roof allowance is what these boxes suit best. Add up the rack, the box and the packed contents, then compare the total with every limit that applies. With the same ski limit and shared access hardware, there is little reason to swap out a box that already fits. Where published documents disagree, confirm the real empty weight and the shape of your luggage.
By the numbers
What we found across the roof cargo boxes we compare, plus the checked facts behind each finding.
| Product | Needs it meets | Facts we checked | Sources |
|---|---|---|---|
| Thule Motion 3 XL |
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| Thule Force 3 XL |
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Ready to buy
Open either model on Amazon for the current price, customer reviews and delivery options.

The hatch stays usable at 53 inches of front clearance, provided the rack otherwise fits
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You like the matte finish and your car satisfies the stricter hatch requirement
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