14 Cubic Feet vs 11 Cubic Feet Roof Cargo Boxes: Which Should You Buy?
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You are deciding between a 14 Cubic Feet vs 11 Cubic Feet roof cargo box for your next trip. Both units offer lockable, hard-shell storage that mounts to crossbars without tools. The main difference lies in volume and physical footprint. The larger box provides more space and weight capacity, while the smaller one offers a more compact profile. You should review the specific dimensions and load limits to see which fits your vehicle and gear needs best.
Key differences
| Aspect | Relaxcabine 14 cu ft Hard Shell Roof Box | DNA Motoring 11 cu ft Roof Box |
|---|---|---|
| Capacity | 14 cu ft | 11 cu ft |
| Load Capacity | 150 lb | 110 lb |
| Dimensions | 62.5 x 32.48 x 13.19 in | 53 x 34 x 15 in |
| Opening | Dual-side | Side |
| Shell Material | ABS + PMMA | ABS |
| Weight | 30.2 pounds | not listed |
Which one should you choose?
Choose Relaxcabine 14 cu ft Hard Shell Roof Box if
- You need to carry bulky camping gear or multiple suitcases.
- You want to load items from either side of your vehicle.
- Your roof rack has a higher weight limit for the box itself.
Choose DNA Motoring 11 cu ft Roof Box if
- You have a smaller vehicle with limited roof space.
- You primarily carry lighter loads under 110 lbs.
- You prefer a shorter box that sits further back on the roof.
Verdict: Choose the 14 cu ft box if you need maximum volume and dual-side access for heavy loads. Pick the 11 cu ft model if your vehicle is smaller or you only need extra space for lighter, less voluminous items.
14 Cu Ft vs 11 Cu Ft Roof Box
Storage capacity
The Relaxcabine model offers 14 cubic feet of internal volume, providing significantly more space for luggage and gear than the DNA Motoring unit, which holds 11 cubic feet. This three-cubic-foot difference matters when packing for family road trips or long-distance travel. The larger capacity allows you to fit bulkier camping equipment or multiple suitcases that might not fit in the smaller box. If you frequently haul large items, the extra space in the Relaxcabine reduces the need for multiple trips or external storage. The DNA Motoring box is sufficient for lighter loads or shorter trips where space is less critical. You should choose based on your typical cargo volume needs.
Weight limit
Load capacity differs between these two carriers. The Relaxcabine box supports up to 150 pounds of evenly distributed weight. In contrast, the DNA Motoring box has a maximum capacity of 110 pounds. This 40-pound difference means the Relaxcabine can handle heavier loads, such as full sets of camping gear or multiple large bags. If you often transport dense items like tools or equipment, the higher limit on the larger box provides a safer margin. The DNA Motoring unit requires you to be more mindful of weight distribution to stay within its lower limit. Always ensure your roof rack system can also support the intended load.
Opening design
Access to cargo varies by design. The Relaxcabine features a dual-side opening, allowing you to load and unload from either side of the vehicle. It includes a wide 15-inch passenger-side opening, which is helpful in tight parking spots. The DNA Motoring box opens from the side only, with a 14-inch wide opening. While both allow side access, the dual-side feature on the Relaxcabine offers greater flexibility. You can access cargo from the curb side or the traffic side without moving the vehicle. The DNA Motoring unit restricts you to one side, which may be inconvenient in narrow spaces. For convenience in varied parking situations, the dual-side option is superior.
Physical dimensions
The physical footprint affects aerodynamics and garage storage. The Relaxcabine measures 62.5 inches in length, 32.48 inches in width, and 13.19 inches in height. The DNA Motoring box is shorter at 53 inches long, but wider at 34 inches, and taller at 15 inches. The DNA Motoring unit is more compact in length, potentially fitting better on smaller vehicles or affecting wind noise differently. However, its greater height and width might increase drag. The Relaxcabine is longer but slightly narrower and lower. Consider your vehicle's roof space and aerodynamic preferences. The shorter box may be easier to handle in tight garages or carports.
Material and build
Both boxes use ABS plastic for durability, but the composition differs. The Relaxcabine uses a blend of ABS and PMMA materials, providing impact resistance and a glossy exterior that withstands sun and rain. The DNA Motoring box is constructed from rugged ABS with a textured black finish. The PMMA addition in the Relaxcabine may offer enhanced clarity or surface hardness, contributing to its glossy look. The DNA Motoring texture might hide scratches better. Both are designed to protect contents from weather. The Relaxcabine claims waterproof performance, while the DNA Motoring notes protection from inclement weather. Both rely on key locks for security. The material choice impacts long-term appearance and resistance to environmental wear.
Which Roof Box Fits Your Needs
Families needing maximum cargo volume
You should choose the Relaxcabine model if you need extra space for family road trips. Its 14 cubic feet capacity holds more luggage and camping gear than the 11 cubic feet option. The 150 lb load limit also supports heavier loads, making it ideal for extended travel with bulky items.
Drivers prioritizing dual-side access
Choose the Relaxcabine box for its dual-side opening design. You can load items from either side of your vehicle, which is helpful in tight parking spots. The 15-inch passenger-side opening allows quick access without climbing over the roof, saving time and effort during your stops.
Users with narrower crossbars
Select the DNA Motoring box if your vehicle has narrower crossbars. Its 34-inch width is wider than the Relaxcabine, but its shorter 53-inch length may fit better on smaller roof racks. This compact footprint is sufficient for lighter loads up to 110 lbs and fits standard crossbar setups.
Quick picks
| # | Product | Best for | Price |
|---|---|---|---|
| 1 | Relaxcabine 14 cu ft Hard Shell Roof Box | Families needing high capacity and side access | Check price of Relaxcabine 14 cu ft Hard Shell Roof Box on Amazon |
| 2 | DNA Motoring 11 cu ft Roof Box | bulky items and secure crossbar mounting | Check price of DNA Motoring 11 cu ft Roof Box on Amazon |
The products compared
Relaxcabine 14 cu ft Hard Shell Roof Box
Best for: Families needing high capacity and side access
- Capacity
- 14 Cubic Feet (what this guide is about)
- Shell Type
- ABS + PMMA
- Opening
- Dual-side
- Load Capacity
- 150 lb
- Water Resistance
- Waterproof
- Security
- Key lock
View on Amazon: Relaxcabine 14 cu ft Hard Shell Roof Box Affiliate link
This 14 cubic feet roof cargo box offers ample space for luggage and camping gear. It supports up to 150 pounds of load and features dual-side opening for easy access. The hard shell construction uses ABS and PMMA materials for durability. You can install it tool-free on round, square, or aerodynamic crossbars. The key lock system secures your items during transport.
Pros
- 14 cubic feet capacity for bulky items
- Dual-side opening with 15-inch passenger access
- Tool-free installation on most crossbar types
- 150 lb load capacity for heavy gear
- Key lock system with multiple locking points
Cons
- Weighs 30.2 pounds, adding significant roof weight
- Dimensions are 62.5 x 32.48 x 13.19 inches, which may overhang wider vehicles
- No mention of integrated mounting hardware for crossbars
Good fit if
- You need extra space for family road trips
- You want to load gear from the passenger side
- You have round or square crossbars for mounting
Skip if
- You have a vehicle with a narrow roof width
- You require a lightweight carrier under 25 pounds
- You need a capacity smaller than 14 cubic feet
Verdict: Relaxcabine 14 Cu Ft Hard Shell Roof Box fits families needing high capacity and easy side access. It suits those with standard crossbars who prioritize storage volume over minimal weight.
DNA Motoring 11 cu ft Roof Box
Best for: bulky items and secure crossbar mounting
- Capacity
- 11 Cubic Feet (what this guide is about)
- Shell Type
- ABS
- Opening
- side
- Load Capacity
- 110 lbs
- Security
- key and lock
- Installation
- no tool assembly
View on Amazon: DNA Motoring 11 cu ft Roof Box Affiliate link
This DNA Motoring carrier offers 11 cubic feet of storage with a 53-inch length and 34-inch width. It features a textured ABS shell and a side-opening lid that widens to 14 inches for bulky items. The unit supports up to 110 lbs and includes a key lock. It mounts to crossbars without tools, providing secure, weather-resistant storage for your vehicle.
Pros
- 11 cubic feet internal capacity
- Side-opening lid expands to 14 inches
- Key lock security system
- Tool-free installation on crossbars
Cons
- 110 lb load limit is lower than larger boxes
- 53-inch length is shorter than 62.5-inch competitors
- Fits crossbars only, not factory rails
Good fit if
- You need to transport wide or bulky items
- Your vehicle has aftermarket crossbars
- You want a secure, lockable storage solution
Skip if
- You require more than 11 cubic feet of space
- You need to carry loads over 110 lbs
- Your vehicle lacks crossbars for mounting
Verdict: DNA Motoring 11 Cu Ft Roof Cargo Box suits those prioritizing wide access and secure locking over maximum volume. It is a practical option for medium loads on vehicles with crossbars.
Specifications side by side
| Spec | Relaxcabine 14 cu ft Hard Shell Roof Box | DNA Motoring 11 cu ft Roof Box |
|---|---|---|
| Capacity | 14 cu ft | 11 cu. ft. |
| Shell Type | ABS + PMMA | ABS |
| Opening | Dual-side | side |
| Load Capacity | 150 lb | 110 lbs |
| Water Resistance | Waterproof | not stated |
| Security | Key lock | key and lock |
| Installation | Tool-free | no tool assembly |
| Vehicle Compatibility | Round, square, most aero crossbars | fits vehicles with cross bars only |
| Dimensions | 62.5 x 32.48 x 13.19 in | 53" L x 34" W x 15" H |
| Recommended Use | Luggage, gear, camping equipment | not stated |
| Vehicle Type | not stated | Car |
| Mount Type | not stated | Roof Mount |
| Lockable | Lockable | Lockable |
| Weight | 30.2 pounds | not stated |
| Size | 14 Cu Ft White | 11 cu. ft. |
| Color | White | Textured Black |
| Model | Cargo Box 14 Cu Ft White | PT-ZTL-8166-BK |
Frequently asked questions
Do 14 cubic feet vs 11 cubic feet roof boxes fit standard crossbars?
Yes, both units are designed for standard crossbar mounting. The Relaxcabine 14 cu ft model and the DNA Motoring 11 cu ft box both use roof mount systems. They secure directly to crossbars without requiring special tools. You should verify your crossbar width matches the mounting hardware specifications before purchasing.
What is the maximum weight limit for a 14 cubic feet roof cargo box?
The Relaxcabine 14 cu ft hard shell roof box has a load capacity of 150 lb. This limit applies to the total weight of the cargo you place inside. You must ensure your vehicle roof also supports this weight. Exceeding the box limit can damage the unit or the roof rack.
How much does a 14 cubic feet roof box weigh?
The Relaxcabine 14 cu ft model weighs 30.2 pounds. This is the empty weight of the hard shell. Heavier boxes can affect vehicle fuel efficiency and handling. You should compare this weight against the lighter DNA Motoring 11 cu ft option if minimizing added mass is a priority.
Can you access a 14 cubic feet roof box from both sides?
Yes, the Relaxcabine 14 cu ft model features dual-side opening. This allows you to load or unload gear from either the driver or passenger side. This is useful when parking in tight spaces. The DNA Motoring 11 cu ft box offers wide access but does not specify side-opening functionality.
Are 14 cubic feet vs 11 cubic feet roof boxes lockable?
Both listed models are lockable. The Relaxcabine 14 cu ft and DNA Motoring 11 cu ft boxes include locking mechanisms to secure your cargo. This feature helps prevent theft while you are away from your vehicle. Always use the provided keys or combination locks when leaving the box on your roof.
What are the dimensions of a 14 cubic feet roof cargo box?
The Relaxcabine 14 cu ft box measures 62.5 inches in length, 32.5 inches in width, and 13.2 inches in height. These dimensions determine if it fits your vehicle. Larger boxes may obstruct rear visibility or interfere with open trunk doors. Measure your vehicle roof space before buying.
Which roof box is better for bulky items?
The DNA Motoring 11 cu ft box is noted for handling bulky items. Its 53-inch length and 34-inch width provide a wide footprint. This shape suits irregularly shaped gear like sports equipment. The Relaxcabine 14 cu ft offers more volume but has a different length-to-width ratio.