THULE 639851 Roof Cargo Carrier Motion Box 197074566157

( Brand: Thule ), ( Manufacturer Part Number: 639851 ), ( Part Type: Box ), ( UPC: 197074566157 ), ( Universal Fitment: Yes )

Review THULE Roof Cargo Carrier Motion Xl Rooftop Box Black

The **Thule 639851 Motion XL Box** is a premium, high-performance roof cargo carrier designed to transform your vehicle into a versatile, space-efficient hauling solution for everything from weekend adventures to serious outdoor excursions. Engineered with Thule s signature precision and durability, this roof box combines aerodynamic efficiency with robust construction to ensure both safety and functionality on every journey. Its sleek, streamlined design minimizes wind resistance, reducing drag and improving fuel economy while maintaining a clean, streamlined appearance that blends seamlessly with modern vehicles. The Motion XL Box features a **spacious 11.5 cubic feet of internal volume**, providing ample room for luggage, sports gear, kayaks, or even a small cooler, making it ideal for families, road trippers, or outdoor enthusiasts who need reliable storage without sacrificing vehicle performance.

Constructed from **high-strength, corrosion-resistant aluminum**, the box is built to withstand the rigors of daily use, from harsh weather conditions to rough road vibrations. The **reinforced corners and edges** ensure structural integrity, while the **durable, powder-coated finish** resists scratches and fading, keeping the box looking sharp for years. The **quick-release locking system** allows for effortless installation and removal, even in tight spaces, and the **adjustable roof rails** ensure a secure, wobble-free fit on most vehicles, from sedans to SUVs. For added convenience, the **soft-close lid** with a **one-handed release** makes loading and unloading a breeze, while the **integrated handle** provides easy portability when the box is detached.

Inside, the Motion XL Box offers thoughtful storage solutions, including **removable, washable interior liners** that protect your belongings from dirt and moisture, and **customizable dividers** to organize gear efficiently. The **vented design** promotes airflow, reducing condensation and keeping contents dry, even in humid or rainy conditions. For those who prioritize security, the box features **double-latch locking mechanisms** and a **keyed lock option** (sold separately), ensuring your valuables stay safe and secure during transit. Whether you re heading to the beach, a hiking trip, or a family vacation, the Motion XL Box delivers the perfect balance of capacity, protection, and ease of use, making it an indispensable accessory for any adventurer who demands both style and substance.

The Thule 639851 Motion XL Box is a popular roof cargo carrier designed for SUVs and larger vehicles. Below is a detailed breakdown of its pros and cons, followed by a conclusion and recommendation.

1. **Spacious and Versatile Storage** The Motion XL Box offers a large, enclosed cargo area that can securely hold a variety of items, including luggage, sports equipment, groceries, or even a small cooler. Its rectangular shape maximizes space efficiency compared to round or oval carriers.

2. **Durable Construction** Thule is known for high-quality materials, and this carrier features a sturdy polycarbonate shell with reinforced corners. It is designed to withstand impacts, weather, and UV exposure, making it a long-lasting option.

3. **Easy Installation and Removal** The carrier uses Thule s patented Quick Release System, allowing for quick and hassle-free mounting and dismounting. This feature is particularly useful for frequent travelers or those who need to switch between vehicles.

4. **Secure and Weatherproof** The enclosed design protects contents from rain, snow, and dust. The lid is securely fastened with a latch system, and the carrier includes a built-in handle for easy transport when not mounted.

5. **Compatibility with Thule s Mounting System** It is designed to work seamlessly with Thule s roof rails, crossbars, or direct-mount systems, ensuring a stable and secure fit on most SUVs and trucks.

6. **Good Weight Capacity** With a payload capacity of up to 150 lbs (68 kg), it can carry a significant amount of gear, though the exact capacity may vary depending on the vehicle s roof rails.

7. **Easy to Clean** The smooth polycarbonate surface is simple to wipe down, and the enclosed design prevents debris from accumulating inside.

8. **Quiet Operation** Unlike some open cargo carriers, the enclosed design reduces wind noise at highway speeds, making for a more comfortable ride.

1. **Limited Compatibility with Smaller Vehicles** This carrier is designed for larger SUVs and trucks with roof rails. It may not fit well or securely on smaller vehicles, such as sedans or compact SUVs, unless they have compatible crossbars.

2. **Increased Wind Resistance** While it is quieter than open carriers, the large enclosed shape can still create more wind turbulence at high speeds, potentially affecting fuel efficiency and handling slightly.

3. **Weight** The carrier itself is relatively heavy, weighing around 30 lbs (13.6 kg). This adds to the overall weight of the vehicle, which may impact fuel economy and handling, especially on smaller or lighter SUVs.

4. **Potential for Roof Rail Damage** If the vehicle s roof rails are not properly installed or are of low quality, the weight of the carrier could cause long-term wear or damage to the rails.

5. **Cost** The Motion XL Box is a premium product, and its price reflects that. For budget-conscious buyers, there may be more affordable alternatives, though they may not offer the same level of durability or features.

6. **Storage Space Trade-Off** While the carrier is spacious, it may not fit as neatly as a smaller or more compact design on vehicles with limited roof space. Some users may find it protrudes too far outward.

7. **Lid Handling** The lid is relatively heavy and can be awkward to open or close, especially when fully loaded. Some users may find it cumbersome compared to carriers with lighter lids.

The Thule 639851 Motion XL Box is an excellent choice for those who prioritize durability, security, and spacious storage for their roof cargo needs. Its enclosed design offers protection against the elements and reduces wind noise, making it ideal for long trips or frequent travelers. The Quick Release System adds convenience, and the carrier s robust construction ensures long-term reliability.

However, it is not the best fit for smaller vehicles or budget-conscious buyers. The added weight and potential wind resistance may also be considerations for those who prioritize fuel efficiency or handling. If you have a compatible vehicle and need a reliable, high-capacity roof cargo solution, this carrier is a strong recommendation. For those with smaller vehicles or lower budgets, exploring alternatives like Thule s smaller carriers or other brands may be more suitable.

If you own a larger SUV or truck with roof rails and require a durable, enclosed roof cargo carrier for frequent use, the Thule 639851 Motion XL Box is highly recommended. It strikes a balance between capacity, security, and ease of use. However, if you are on a tighter budget, have a smaller vehicle, or prioritize minimal wind resistance, consider alternatives such as Thule s smaller carriers (e.g., the Motion X3) or other brands like Yakima or ARB. Always ensure your vehicle s roof rails are properly installed to support the weight of the carrier.

Details:

Available accessories include interior box light, protective liner, and storage cover. The integrated torque indicators when its properly mounted, ensuring fast and secure fitting. Slide Lock system with separate locking and opening functions, automatically locks the lid in place indicates when box is closed securely. Sturdy lid design with a wide handle for smooth opening and closing just one hand.

Thule Motion 3 XL: Wing-shaped profile with a dynamic, forward-leaning nose for reduced drag and fuel efficiency. Easy to mount thanks the Power quick-mount system.

part #: 639851 price

• $1782.99

specifications azcarracks:

• brand: Thule
• mpn: 639851
• part type: Box
• upc: 197074566157
• universal fitment: Yes

payments azcarracks:

• credit card: Diners-club
• wallet: Apple-pay
• other

shipping azcarracks:

• carrier: FedEx
• type: Fixed
• transit: 2-3 Days
• class: Expedited
• service: FedEx 2Day
• cost: $0.00

returns azcarracks:

• policy: Returns Accepted
• paid by: Seller
• time: 30 Days

general azcarracks:

• condition: New
• Car Truck Parts Accessories > Racks Cargo Carriers > Roof Racks Cross Bars

seller azcarracks:

• # reviews: 75
• city: Phoenix, Arizona
• rating: 100.0%

offer azcarracks:

• options: Ship-to-home
• availability: In Stock
• best offers: True
• sold: 0
• quantity: 2
• started: May 26, 2026

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