If you want maximum volume and a sleek, aerodynamic profile for highway travel with a roof rack, choose Garvee Rooftop Cargo Box; if you need rugged durability and deep storage specifically designed for off-road platforms and overlanding, choose WD-II Cargo Box.
• This pick is for families and road trippers who prioritize sheer storage capacity and smooth highway cruising.
• WD-II Cargo Box: The biggest strength is its lightweight 20-pound build and heavy-duty construction with reinforced ribbing tailored for rough terrain; the trade-off is a smaller footprint that sacrifices total cubic footage for a lower center of gravity and better handling on uneven ground. This pick is for off-roaders, campers, and fleet operators who need gear protection in harsh environments.
The Garvee unit is engineered for those who view the roof of their vehicle as an extension of their living space. With dimensions reaching 54.3 inches in length and a width of 31.5 inches, this box offers a cavernous 11.5 cubic feet (326 liters) of storage. That is a significant amount of room. If you are planning a long-distance road trip where every piece of luggage counts, or if you have a family of four needing to transport skis, strollers, and camping gear simultaneously, the sheer volume here is unmatched by many competitors in this size class.
What sets this design apart is the focus on convenience and accessibility. The dual-sided opening system is a game-changer for drivers who park in tight spaces or narrow driveways. You can access the contents from either side of the vehicle without having to walk around to the passenger side or climb over anything. It includes two keys and two straps to ensure security while allowing one side to be locked while the other is open, a thoughtful detail for shared vehicles. The hard shell is crafted from high-quality ABS material, offering waterproof and UV-resistant protection. This ensures your belongings stay dry during unexpected rainstorms and don't fade under the sun, making it a reliable companion for cross-country journeys.
However, this box is not for everyone. The aerodynamic shape helps reduce noise and drag, but the physical presence of the box is undeniable. If you drive a smaller sedan with a low roof line or a compact SUV with limited load-bearing capacity, the 31.5-inch width might feel too wide, potentially interfering with garage clearance or door openings. Furthermore, while it fits universal roof racks, you must verify that your specific rack system can handle the weight and span required. It is best suited for larger vehicles like vans, trucks, and full-size SUVs where the roof structure can support the extra heft and volume.
We compare products from their published specs and features; the verdicts below are our independent editorial opinions.
Updated: 2026-11-07 · 6 min read · Independent comparison
In contrast, the WD-II Cargo Box is built for the adventurer who knows that the road often ends where the pavement does. This unit is explicitly designed for vehicles equipped with roof platforms rather than just standard crossbars. The tactical nature of its design becomes immediately apparent when you look at the construction. It features a heavy-duty exterior with reinforced ribbing, a feature that suggests it is meant to withstand impacts from branches, rocks, or debris common in off-road environments. While the Garvee focuses on aerodynamics for the highway, the WD-II prioritizes structural integrity for the trail. If you are running an overlanding setup or managing a fleet of vehicles that traverse rough terrain, the reinforced latches and rubber-sealed lid provide peace of mind that standard cargo boxes simply cannot offer.
The depth of the WD-II is another defining characteristic. At nearly 16 inches tall, it accommodates taller, bulkier items that would get stuck in shallower containers. This makes it ideal for carrying recovery gear, tools, tents, and sleeping bags that require vertical space. The multiple heavy-duty side latches ensure the lid stays firmly closed even when the vehicle is bouncing over bumps or driving at higher speeds on unpaved surfaces. This secure locking mechanism prevents the "jingle-jangle" of loose lids and keeps dust and water out, maintaining a clean interior environment for your sensitive electronics or delicate camping supplies. The inclusion of a sturdy handle simplifies the loading process, allowing you to lift and transfer the box with less strain compared to units without integrated lifting points.
The primary compromise here is size. At 44.5 inches in length, the WD-II is noticeably shorter than the Garvee, resulting in less total cubic footage. If your goal is to maximize the number of suitcases or large bulky items you can fit on the roof, you will find yourself making more trips or leaving some gear behind. Additionally, the lower profile, while beneficial for stability, might limit the height of certain tall items if they do not fit within the 15.7-inch height constraint. This box is perfect for solo adventurers, couples, or small teams who need robust protection and ease of access to gear in remote locations, rather than maximum storage capacity for large groups.
• Best for maximum storage volume → Garvee Rooftop Cargo Box, offering 11.5 cubic feet versus the WD-II's more compact interior.
• Best for off-road durability → WD-II Cargo Box, with reinforced ribbing and heavy-duty latches designed for rough terrain.
• Best for fuel efficiency and handling → WD-II Cargo Box, due to its lighter 20-pound weight reducing roof load and drag.
• Best for tight parking scenarios → Garvee Rooftop Cargo Box, thanks to the dual-sided opening system allowing access from either side of the vehicle.
• Best for heavy-duty tool and gear transport → WD-II Cargo Box, featuring a deeper interior and rugged construction for oversized equipment.
• Best for highway comfort → Garvee Rooftop Cargo Box, with its aerodynamic shape minimizing wind noise on long paved drives.
• Best for fleet vehicles operating in mixed conditions → WD-II Cargo Box, providing the ruggedness needed for diverse routes while keeping weight manageable.
• Best for universal compatibility → Both work with roof racks, but Garvee emphasizes standard crossbars while WD-II targets roof platforms.
After analyzing the specifications and intended use cases for both units, I recommend the WD-II Cargo Box for my own needs, particularly if I were equipping a vehicle for a fleet of delivery or service vehicles that frequently encounter varied road conditions. The combination of a lighter 20-pound frame and the reinforced, impact-resistant construction makes it the smarter choice for long-term reliability. While the Garvee wins on raw volume, the WD-II's focus on durability and deep storage for tools and camping gear offers better utility for serious users who cannot afford damage to their cargo. In my opinion, the rugged design of the WD-II justifies the slight reduction in cubic footage because protecting your gear is more important than fitting a few extra items on top.
Both boxes are designed for vehicles with roof racks, but the WD-II is specifically optimized for roof platforms, while the Garvee is built for standard crossbars. Always check your vehicle's manufacturer guidelines before purchasing.
Both feature waterproof designs, but the WD-II uses a rubber-sealed lid with multiple heavy-duty latches specifically to keep out dust and water in harsh off-road conditions, whereas the Garvee relies on its sealed ABS shell for weather resistance on the highway.
No special tools are mentioned in the product data sheets; both rely on included straps, keys, and latches for securing the lid and attaching to the roof structure, following the installation instructions provided with the box.
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