If you want a dedicated, high-capacity storage solution that fits almost any roof rack setup and offers dual-sided access for tight loading zones, choose Yakima SkyBox NX 18; if you need a complete vehicle-specific crossbar system designed to expand the utility of your Jeep Grand Cherokee without drilling or modification, choose BVWBCR Jeep Grand Cherokee.
• BVWBCR Jeep Grand Cherokee: Its biggest strength is being a complete, vehicle-specific crossbar kit that mounts securely to factory rails on 2011–2021 Jeeps without tools, though it is an accessory rather than a cargo box itself.
• Best for: Choose the Yakima if you are a family or group needing maximum enclosed storage for a road trip; choose the BVWBCR if you own a Jeep Grand Cherokee and need the foundational hardware to mount any cargo box or bike rack safely.
The Yakima SkyBox NX 18 is engineered for people who prioritize raw storage volume and ease of loading above all else. With 18 cubic feet of capacity, this unit does not just offer space; it redefines what fits in a rooftop carrier. The internal design features an unobstructed, flattened floor which is a critical detail for anyone trying to transport bulky items like camping tents, sleeping bags, or even large coolers. Unlike many boxes with sloped floors that waste vertical height, this flat surface maximizes every inch of the interior. It can comfortably accommodate up to four campers' worth of gear, making it a serious contender for multi-day wilderness excursions where packing light is impossible.
A standout feature for urban drivers and those navigating narrow parking garages is the dual-sided opening design. This allows you to load and unload gear from either side of the vehicle. If you are parked between two cars in a tight lot, or if you have a passenger-side obstruction, you still have full access to your belongings. The black finish with an NX nano-texture on both the lid and base provides a sleek, modern aesthetic that resists showing dirt and scratches, keeping the vehicle looking clean even after heavy use. Security is handled by a full metal opening handle that locks both the contents inside the box and the box to the vehicle, giving peace of mind when leaving gear unattended.
However, this product is not for everyone. It is strictly a cargo box, meaning it assumes you already have a way to attach it to your car. You will need to source compatible crossbars separately, which adds to the overall complexity and cost of the project. While the build is durable, the weight factor means you need strong roof rails to support it. If you do not currently have a roof rack system, buying the Yakima alone will leave you with nowhere to put it. This product is best suited for the buyer who has already identified their need for extra storage and simply wants the highest quality, most spacious container available to fit into their existing setup.
We compare products from their published specs and features; the verdicts below are our independent editorial opinions.
Updated: 2026-11-08 · 6 min read · Independent comparison
The BVWBCR system is built specifically for owners of the Jeep Grand Cherokee models from 2011 through 2021. It addresses a fundamental problem for Jeep owners: how to add roof utility without compromising the vehicle's structure or appearance. This is not a cargo box; it is a high-strength aluminum alloy crossbar rack designed to act as the foundation for one. The clamping accessories align perfectly with the factory original roof side rails, ensuring a secure fit that requires no cutting, drilling, or permanent modification to the car body. For a driver who values the pristine condition of their vehicle while wanting to carry more gear, this custom fit is the primary selling point.
Durability and stability are central to the design of these crossbars. Constructed from high-strength aluminum, they maintain structural rigidity even under long-term exposure to harsh elements like rain, snow, and intense sunlight. The material choice ensures they will not bend, deform, or corrode, which is essential for off-road travel or long-distance self-driving trips where the vehicle faces rougher conditions. The aerodynamic streamlined structure is another key benefit, reducing air resistance and minimizing the wind noise that often plagues aftermarket roof racks. This means you can drive at highway speeds without the cabin becoming filled with a constant drone, preserving comfort during long journeys.
This system shines when you need flexibility. The built-in standard T-slots allow for the quick installation of various accessories, including cargo boxes, bicycle brackets, and other rooftop gear. This transforms your Jeep into a versatile hauler capable of handling anything from weekend camping supplies to full mountain biking setups. The package includes all necessary hardware and detailed assembly guides, enabling a DIY installation that feels secure even on rugged, bumpy roads. It frees up significant cabin and trunk space, making it ideal for families planning trips where every inch of interior room counts. However, it is important to understand that this product solves the mounting problem, not the storage problem. You must buy a separate cargo box or basket to actually hold your luggage. It is the perfect choice for the Jeep owner ready to customize their roof but unwilling to compromise on fitment or vehicle integrity.
• Best for maximum storage volume → Yakima SkyBox NX 18 (18 cu ft of dedicated, enclosed space).
• Best for vehicle-specific fitment → BVWBCR Jeep Grand Cherokee (Custom clamps for 2011–2021 models, no drilling).
• Best for easy loading in tight spaces → Yakima SkyBox NX 18 (Dual-sided access handles narrow parking scenarios).
• Best for expanding existing utility → BVWBCR Jeep Grand Cherokee (Adds T-slots to mount any box or bike rack).
• Best for aerodynamic efficiency → BVWBCR Jeep Grand Cherokee (Streamlined design reduces wind noise and drag).
• Best for pre-loaded security → Yakima SkyBox NX 18 (Integrated locking mechanism for box and vehicle).
• Best for off-road durability → Both excel here, but BVWBCR uses corrosion-resistant aluminum alloy for long-term exposure.
• Best for immediate cargo holding → Yakima SkyBox NX 18 (Ready to pack out of the box).
• Best for DIY customization → BVWBCR Jeep Grand Cherokee (Allows you to mix and match accessories via T-slots).
In my opinion, the right choice depends entirely on whether you are missing a box or missing the bars. If you already have roof rails and just need more room for your gear, the Yakima SkyBox NX 18 is the superior purchase because it delivers immediate, massive storage with a smart dual-sided design that saves time. However, if you own a Jeep Grand Cherokee and are starting from scratch, the BVWBCR system is the essential first step; without it, the Yakima has nothing to sit on. For buyers navigating tight spaces, the Yakima's ability to open from either side makes it the more practical tool for daily loading, provided you have the infrastructure to support it. I would recommend the Yakima for pure storage needs and the BVWBCR for Jeep owners looking to build a complete, customizable roof system from the ground up.
Yes, it features universal mounting, meaning it works with most standard crossbars, but you must verify your current rail width and compatibility before purchasing since it does not include the bars themselves.
No, the BVWBCR system is designed for DIY installation using included hardware and step-by-step guides, requiring no cutting or drilling into the Jeep's body panels.
The BVWBCR crossbars are specifically engineered with an optimized aerodynamic streamlined structure to reduce air resistance and wind noise compared to generic, non-streamlined bar systems.
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