Sailnovo Car Rooftop Cargo Carrier vs Sailnovo 15 Cubic Feet/430L Car: Spec Comparison
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You are comparing the sailnovo car rooftop cargo carrier vs 15 cubic feet 430l car options from Sailnovo. Both are soft-shell roof bags designed for cars. They share a similar footprint and waterproof construction. The main difference lies in capacity and mounting hardware. One offers more space with standard straps. The other provides a secure door-hook system for vehicles without racks. This guide breaks down the specs to help you decide.
Key differences
| Aspect | Sailnovo 21 cu ft Soft Roof Bag | Sailnovo 15 cu ft Soft-Shell Roof Bag |
|---|---|---|
| Capacity | 21 cubic feet | 15 cubic feet / 430 L |
| Weight | 8.16 pounds | 5.6 pounds |
| Installation Method | Tie-Down Strap | 2 reinforced straps, 4 door hooks |
| Shell Material | Soft Shell | Soft shell (1000D fabric) |
| Color | Black | Grey |
Which one should you choose?
Choose Sailnovo 21 cu ft Soft Roof Bag if
- You need maximum storage volume for large trips.
- You already have roof racks or side rails.
- You prefer a black finish.
Choose Sailnovo 15 cu ft Soft-Shell Roof Bag if
- You drive a car without roof racks.
- You want a lighter bag that is easier to handle.
- You want extra security via door hooks.
Verdict: The 21 cubic feet bag is the better choice if you prioritize raw storage space and already have roof racks. The 15 cubic feet bag is more versatile for cars without racks due to its door hooks. It is also lighter and features thicker fabric.
Capacity and Mounting Hardware
Storage Capacity
The Sailnovo 21 cu ft Soft Roof Bag offers 21 cubic feet of volume, providing more space for luggage and gear. In comparison, the Sailnovo 15 cu ft Soft-Shell Roof Bag provides 15 cubic feet, or 430 liters, of storage. This difference matters if you have large suitcases or camping equipment. The larger bag holds more items without needing multiple trips. If you prioritize maximum volume over a smaller footprint, the 21 cubic feet model is the better choice. The 15 cubic feet option is sufficient for smaller loads but holds less overall.
Mounting Hardware
Installation methods differ between the two models. The 21 cubic feet bag uses standard tie-down straps for securing the load to your roof. The 15 cubic feet bag includes two reinforced straps and four door hooks. The door hooks allow installation on cars without roof racks, offering greater versatility for vehicles lacking crossbars. This feature makes the 15 cubic feet model more adaptable for a wider range of car types. If your vehicle lacks roof rails, the door hook system provides a more secure and rain-resistant attachment point than standard straps alone.
Weight
Weight affects fuel efficiency and roof load limits. The Sailnovo 21 cu ft Soft Roof Bag weighs 8.16 pounds. The Sailnovo 15 cu ft Soft-Shell Roof Bag weighs only 5.6 pounds. The lighter bag reduces the overall weight on your vehicle’s roof. This is beneficial if you are close to your car’s maximum roof load capacity. The lighter model also may be easier to handle when installing or removing. For drivers concerned about minimizing added weight, the 5.6 pound option is the practical choice.
Dimensions
Both bags share the same length of 9.84 inches. However, their widths and heights vary slightly. The 21 cubic feet bag is 7.09 inches wide and 13.8 inches tall. The 15 cubic feet bag is narrower at 6.69 inches wide and slightly shorter at 13.4 inches tall. The narrower profile of the 15 cubic feet model may fit better on smaller roof racks or cars with limited width. The 21 cubic feet bag is slightly bulkier, which might interfere with garage clearance or aerodynamics on some vehicles. Choose based on your roof’s available width.
Material Strength
The 15 cubic feet bag is constructed from triple-layer high-density 1000D soft shell fabric. This material is described as twice as strong as 500D fabric. The 21 cubic feet bag is listed as a soft shell but does not specify the fabric denier in the provided data. The 1000D fabric on the smaller bag offers enhanced tear resistance and durability. Double-reinforced strap seams on the 15 cubic feet model further improve longevity. If material toughness is a priority, the specified 1000D construction of the 15 cubic feet model provides a clear advantage in build quality.
Which Sailnovo Roof Bag Suits You
Maximize cargo volume needs
If you need extra space, this 21 cubic foot bag holds more gear. It weighs 8.16 pounds and measures 9.84 x 7.09 x 13.8 inches. The soft shell folds compactly. Use the tie-down straps to secure it. Choose this if capacity matters most for your trips.
Lightweight and rack-free install
This 15 cubic foot option weighs only 5.6 pounds. It includes door hooks for cars without roof racks. The 1000D fabric offers tear resistance. It measures 9.84 x 6.69 x 13.4 inches. The waterproof zipper keeps items dry. Pick this for easy mounting on vehicles lacking bars.
Balance weight and space
You get 15 cubic feet of storage without the heavy weight. The grey bag is durable and foldable. It fits most cars securely. The included storage bag keeps it tidy. This choice works well if you prioritize a lighter load and versatile installation methods for your vehicle.
The products compared
Sailnovo 21 cu ft Soft Roof Bag
Best for: cars without roof rails
- Capacity
- 21 cubic feet
- Shell Type
- Soft Shell
- Water Resistance
- Waterproof
- Installation
- Tie-Down Strap
- Dimensions
- 9.84 x 7.09 x 13.8 in
- Vehicle Type
- Car
View on Amazon: Sailnovo 21 cu ft Soft Roof Bag Affiliate link
This Sailnovo roof bag offers 21 cubic feet of storage in a soft shell design. It weighs 8.16 pounds and measures 9.84 x 7.09 x 13.8 inches. The unit uses tie-down straps for installation on cars without roof racks. It is waterproof and fits vehicles lacking luggage rails. This carrier suits drivers needing flexible cargo space without permanent hardware.
Pros
- 21 cubic feet capacity
- Waterproof soft shell
- Fits cars without racks
- Lightweight at 8.16 pounds
Cons
- Soft shell offers less impact protection
- Requires manual tie-down straps
- No rigid structure for stability
Good fit if
- You need extra storage on a car without roof rails
- You want a lightweight, portable solution
- You prefer waterproof fabric over hard plastic
Skip if
- You require a rigid, hard-shell carrier
- You have roof racks and want a secure mount
- You need maximum impact protection for fragile items
Verdict: Sailnovo 21 Cu Ft Soft Roof Bag is a practical option for vehicles without roof rails. It provides ample waterproof storage for drivers who need flexible, rack-free cargo space.
Sailnovo 15 cu ft Soft-Shell Roof Bag
Best for: cars without roof racks
- Capacity
- 15 cubic feet / 430 L
- Shell Type
- Soft shell (1000D fabric)
- Installation
- 2 reinforced straps, 4 door hooks
- Vehicle Compatibility
- Fits most cars with or without roof rack
- Dimensions
- 9.84 x 6.69 x 13.4 in
- Weight
- 5.6 pounds
View on Amazon: Sailnovo 15 cu ft Soft-Shell Roof Bag Affiliate link
This 15 cubic foot roof bag offers 430 liters of storage in a soft 1000D fabric shell. It weighs 5.6 pounds and measures 9.84 by 6.69 by 13.4 inches. You can install it using two reinforced straps and four door hooks, making it suitable for cars with or without roof racks. The design includes a waterproof zipper and double-reinforced seams to protect your gear from rain and snow.
Pros
- 15 cubic feet / 430L capacity
- 1000D triple-layer soft shell fabric
- Door hooks for secure attachment
- Fits cars without roof racks
Cons
- Smaller 15 cubic foot capacity
- Soft shell offers less impact protection
- No rigid hard-shell structure
Good fit if
- You need extra storage for family trips
- You drive a car without roof racks
- You want a compact storage solution
Skip if
- You require maximum impact protection
- You need more than 15 cubic feet
- You prefer rigid hard-shell designs
Verdict: Sailnovo 15 Cu Ft Soft Roof Bag is a practical option for drivers without roof racks who need flexible storage. It suits those prioritizing easy installation and weather resistance over rigid protection.
Specifications side by side
| Spec | Sailnovo 21 cu ft Soft Roof Bag | Sailnovo 15 cu ft Soft-Shell Roof Bag |
|---|---|---|
| Capacity | 21 cubic feet | 15 cubic feet / 430 L |
| Shell Type | Soft Shell | Soft shell (1000D fabric) |
| Water Resistance | Waterproof | not stated |
| Installation | Tie-Down Strap | 2 reinforced straps, 4 door hooks |
| Vehicle Compatibility | not stated | Fits most cars with or without roof rack |
| Dimensions | 9.84 x 7.09 x 13.8 in | 9.84 x 6.69 x 13.4 in |
| Vehicle Type | Car | Car |
| Size | 21 Cubic Feet | 15 Cubic Feet |
| Mount Type | Roof Mount | not stated |
| Weight | 8.16 pounds | 5.6 pounds |
| Color | Black | Grey |
| Model | Sailnovo5033-FR | #ASMD005033_S_V1 |
Frequently asked questions
Which Sailnovo roof bag is lighter, the 21 cu ft or the 15 cu ft model?
The 15 cubic foot model is lighter. It weighs 5.6 pounds, while the 21 cubic foot version weighs 8.16 pounds. The smaller bag also has slightly smaller folded dimensions, measuring 9.84 x 6.69 x 13.4 inches compared to the larger bag's 9.84 x 7.09 x 13.8 inches.
Do both soft shell roof bags fit cars without roof rails?
Yes, both are designed for cars without roof rails or racks. The 21 cubic foot bag is explicitly noted as practical for vehicles lacking roof rails. The 15 cubic foot bag is also described as a practical option for drivers without roof racks, making both suitable for this vehicle type.
What is the difference in storage capacity between these two Sailnovo bags?
The primary difference is volume. The larger bag offers 21 cubic feet of storage space. The smaller bag provides 15 cubic feet, which equals 430 liters. This means the larger model holds significantly more gear, while the smaller one is better for lighter loads or compact vehicles.
What color options are available for these Sailnovo rooftop cargo carriers?
The 21 cubic foot bag comes in black. The 15 cubic foot bag is available in grey. Both models feature a soft-shell construction. The color choice does not affect the mounting method or the internal storage volume, which remains determined by the specific model size you select.
How do the folded dimensions compare for these soft shell roof bags?
The 21 cubic foot bag folds to 9.84 x 7.09 x 13.8 inches. The 15 cubic foot bag folds to 9.84 x 6.69 x 13.4 inches. Both share the same length when folded. The 15 cubic foot version is slightly narrower and shorter in height, making it marginally more compact for storage.
Are these products hard shell or soft shell cargo carriers?
Both products are soft shell roof bags. They do not have rigid plastic or aluminum shells. This design allows them to fold down compactly for storage when not in use. The soft material provides flexible storage space that conforms to the shape of your cargo, rather than offering rigid protection.