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Thule Force XT XL — Versatile Roof-Mounted Cargo Box
The Thule Force XT XL is a rugged, spacious rooftop cargo box built for active lifestyles — whether you’re road-tripping, going camping, or hauling skis and snowboards. Designed for flexibility and everyday practicality, it gives you substantial extra storage while maintaining a sleek, aerodynamic profile.
Requires cross bars on your vehicle before the box can be affixed! This box will clamp to 99% of stock and aftermarket cross bars.
Key Features
Large 18 ft³ capacity: Provides ample space for luggage, camping gear, skis, snowboards, or bulky items — perfect for family trips or outdoor adventures.
Strong load capacity: Rated to carry up to 165 lb — substantially more than many competing boxes.
Secure, fast mounting: Thule’s PowerClick Quick-Mount System ensures easy installation — the integrated torque indicator clicks when the box is properly and safely attached.
DualSide opening: Access your gear from either side of the vehicle, making loading and unloading much more convenient in tight parking spaces or when parked roadside.
Full trunk access: With the box positioned forward on the roof, most vehicles retain full rear hatch clearance — minimizing risk of interference when opening the trunk.
Durable & weather-resistant: The tough AeroSkin exterior can handle all-season use and resist the elements, whether you’re on a summer road trip or a winter ski run.
Lockable for security: Comes with a central locking system and is compatible with Thule’s One-Key System — great for safeguarding gear when traveling or parked.
Technical Specs
Internal capacity: 18 ft³ (≈ 500 L)
External dimensions: 82.75″ L × 33.75″ W × 17.25″ H
Internal dimensions: 77.5″ × 29.5″ × 15.25″
Height off crossbar: ~16.1"
Maximum load capacity: 165 lb (≈75 kg)
Box weight: 47 lb (≈21.3 kg)
Ski capacity: 5–7 pairs (up to 195 cm / ~77 in)
Snowboard capacity: 3–5 boards
Mounting compatibility: Fits Thule WingBar Evo, AeroBlade, SquareBar, ProBar; with adapters, also works with Xsporter Pro, TracRac for trucks/vans.
Why Choose the Force XT XL
If you often find yourself cramming gear into the back seat or overstuffing your trunk — or if you're heading out with bulky items like skis, snowboards, luggage, or camping equipment — the Force XT XL makes life much easier. Its combination of large capacity, robust load rating, easy mounting, and dual-side access makes it a reliable choice for frequent travelers, families, and outdoor enthusiasts.
Because of its forward-mounted position and thoughtful design, most vehicles retain reasonable hatch clearance while still giving you the large storage volume you need. Plus, the tough exterior and locking system keep your gear protected in all seasons.
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Free 8-Point Inspection
At Rocky Mountain Ski + Sport, every ski and snowboard goes through our 8-Point Gear Inspection before it ever leaves the shop. From edge sharpness and base condition to binding safety and DIN settings, our service tech team checks every detail for safety, performance, and durability. We even verify each order and destination before shipping, so you can buy with total confidence.
Whether you shop in-store or online, you can trust that your gear has been thoroughly inspected, tuned when needed, and approved by the same local experts who ride Colorado’s mountains every season.
Size Guide
Click Here To Find Your Perfect Size
Shipping & Returns
Read Our Shipping & Return Policies Here
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NEW Thule Force XT XL Roof Box Matte Black - Pickup ONLY
2 / 6
NEW Thule Force XT XL Roof Box Matte Black - Pickup ONLY
3 / 6
NEW Thule Force XT XL Roof Box Matte Black - Pickup ONLY
4 / 6
NEW Thule Force XT XL Roof Box Matte Black - Pickup ONLY
5 / 6
NEW Thule Force XT XL Roof Box Matte Black - Pickup ONLY
6 / 6
NEW Thule Force XT XL Roof Box Matte Black - Pickup ONLY
NEW Thule Force XT XL Roof Box Matte Black - Pickup ONLY
5‑Star Service from start to finish. I brought in 3 pairs of skis and a snowboard expecting a big tune‑up bill, but the team checked them all and told me one didn’t even need tuning or waxing. Saved me money right there. Met three different staff members and every one was friendly, helpful, and clearly knew their stuff. Honest, professional, and refreshingly straightforward. I’ll definitely be back.
— S.C
Helpful & Caring Staff
We’re looking for ski gears for beginners and I found it here. These guys are supper awesome. They’re very knowledgeable with everything including safety, especially for beginner skiers. I highly recommend them to anyone who’s inexperienced and wanting to start with winter sports.
— D.I
Serious gear for serious adventures
I got a pair of skis from this place (discovered this place randomly when googling my desired model, they have the best price). Was a bit nervous at first cuz I live on the east coast and this is a local shop in Colorado. But it ended up being awesome!
Love that they adjust the bindings for you for free, and they carefully inspect the order items.
— R.H
Affordable Kids Gear
We came in the other day to get my kids snowboards set up. I can't express enough how impressed I was with the customer service here.
On top of that, they charged significantly less then any other ski shop in the springs that I called before. Anything ski/snowboard related, this is the spot!
— G.T
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