Thule Force 3 vs Force XT: Is the Upgrade Worth Your Roof Space?

Ryan ryan@modularacks.com | April 2025

Let's face it – we've all experienced that moment of automotive Tetris when trying to fit one too many suitcases into an already packed car. The Thule Force series has long been the hero swooping in to save road-trippers from the "maybe we should just leave the kids at home" dilemma by expanding your vehicle’s storage capacity. With the shiny new Thule Force 3 roof box hitting the market, it's time to see if it deserves the roof space over its predecessor, the Force XT. Whether you're planning a cross-country adventure, a weekend camping trip, or just need somewhere to stash your mother-in-law's luggage, this comparison will help you decide which roof cargo box deserves the prime real estate on top of your vehicle.

Slicker Than Your Average:

Improved Aerodynamics The Force XT was no slouch in the aerodynamics department, but the Force 3 rooftop cargo carrier is like its more athletic younger sibling who went to the gym and got a makeover. With its enhanced aerodynamic design, the Force 3 slices through the air like a hot knife through butter, significantly reducing wind resistance and that annoying "whooshing" sound that makes you wonder if you've accidentally strapped a tornado to your roof. Your fuel gauge will thank you, and you might actually be able to hear your road trip playlist without cranking the volume to ear-splitting levels.

Lock It Up:

Upgraded Security Features Nothing ruins a vacation faster than finding your cargo box has been relieved of its contents overnight. While the Force XT featured the trusty LockKnob system (which did its job admirably), the Force 3 kicks security up a notch with the new SlideLock system. This clever feature separates the locking and opening functions, automatically securing the lid and giving you a clear indication when it's properly closed. It's like having a tiny security guard dedicated to your roof gear – minus the coffee breaks and donuts.

Looking Good While Taking a Beating:

Improved Aesthetics and Durability The Force 3's new AeroSkin surface isn't just a pretty face – it's built to withstand whatever Mother Nature throws at it. While the Force XT's matte black finish was practical (in the same way sensible shoes are practical), the Force 3 combines style and ruggedness like a fashion model who also happens to be a mountain climber. The improved resistance to scratches and fading ensures your rooftop storage box won't look like it went through a cheese grater after a few trips. For those who believe their vehicle's accessories should look as good as they function, the Force 3 won't disappoint – even after being subjected to UV rays, hailstorms, and the occasional bird with questionable aim.

Effortless Mounting and Dual-Sided Access Both the Force 3 and the outgoing Force XT are equipped with the PowerClick quick-mount system, known for its intuitive and secure installation. The built-in torque indicator clicks when the box is properly mounted, giving you confidence that it's securely attached to your vehicle. Additionally, both models feature dual-sided opening, allowing you to access your gear from either side of the vehicle. This is especially handy when you’re loading up in a crowded parking lot or on a narrow trailhead.

The Lineup: Thule Force 3 Models Specifications Comparison Chart

Specification	L Sport	M	L	XL	XXL
Volume	11 cu ft	14 cu ft	16 cu ft	18 cu ft	21 cu ft
External Dimensions (LxWxH)	75.2 x 24.7 x 16.7 in	69.0 x 32.0 x 17.4 in	76.8 x 33.3 x 16.8 in	84.8 x 34.1 x 18.5 in	91.4 x 35.2 x 17.9 in
Internal Dimensions (LxWxH)	72.0 x 20.2 x 14.4 in	65.8 x 27.3 x 15.1 in	73.6 x 28.7 x 14.4 in	81.5 x 29.5 x 14.7 in	88.2 x 30.5 x 15.6 in
Weight	34 lb	37 lb	43 lb	49 lb	57 lb
Max Length of Skis	175 cm	N/A	175 cm	195 cm	215 cm
Load Capacity Skis (pairs)	3–5	N/A	5–7	5–7	5–7
Load Capacity Snowboards	3–4	N/A	3–5	3–5	3–5

Final Thoughts:

To Upgrade or Not to Upgrade? The Thule Force 3 takes everything that made the Force XT a solid choice and turns the dial up to 11. With beefed-up security features, smoother aerodynamics, and looks that won't embarrass your vehicle, the Force 3 is the clear choice for those in the market for a new roof cargo box. If you're currently rocking a Force XT that's serving you well, the upgrade might not be absolutely necessary – but it's definitely tempting. Think of it as the difference between a perfectly good smartphone and the newest model with all the bells and whistles. You don't need it, but once you have it, you'll wonder how you ever lived without it.

Whether you choose the nimble L Sport or the cavernous XXL, the Thule Force 3 lineup ensures you'll never have to play car Tetris again – at least until the next family vacation when everyone inexplicably packs twice as much as they need.