Mockins 40 cu ft XXL vs Mockins 50 CuFt XXL Heavy-Duty (2026): Key Differences
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This mockins 40 cu ft xxl vs 50 cuft xxl heavy duty comparison looks at two soft-shell roof bags. Both offer waterproof storage without needing a roof rack. They share a 20-inch height and include straps, hooks, and a roof mat. The main difference is volume. The 40 cu ft model provides 40 cubic feet. The 50 cu ft model offers 50 cubic feet. You need to decide if the extra space is worth the larger footprint.
Key differences
| Aspect | Mockins 40 cu ft XXL Soft-Shell Roof Bag | Mockins 50 CuFt XXL Heavy-Duty Roof Bag |
|---|---|---|
| Capacity | 40 cu ft | 50 cu ft |
| Dimensions | 72 x 48 x 20 in | 85 x 50 x 20 in |
| Weight | 15.7 pounds | 18 pounds |
| Shell Type | Soft-shell | Vinyl |
| Color | Black/Orange | Black |
Which one should you choose?
Choose Mockins 40 cu ft XXL Soft-Shell Roof Bag if
- You have a smaller vehicle roof and need a compact fit.
- You prefer a lighter bag that is easier to handle alone.
- You want a high-visibility orange accent on your gear.
Choose Mockins 50 CuFt XXL Heavy-Duty Roof Bag if
- You need maximum storage for large family trips or moves.
- You want the longest bag to accommodate bulky items like tents.
- You prefer a traditional all-black color scheme.
Verdict: Choose the 40 cu ft model if your vehicle roof is smaller or you prioritize a lighter load. Pick the 50 cu ft heavy-duty version if you need every extra inch of space for large cargo. Both options provide secure, waterproof storage without a roof rack.
40 vs 50 CuFt Roof Bag Specs
Capacity and Size
The Mockins 50 CuFt XXL Heavy-Duty offers 50 cubic feet of storage, while the 40 CuFt model provides 40 cubic feet. In terms of physical dimensions, the 50 CuFt version is significantly larger at 85 inches long and 50 inches wide. The 40 CuFt model measures 72 inches long and 48 inches wide. Both share a 20-inch height. If you need to haul large items like multiple suitcases, tents, or sleeping bags for a big family, the 50 CuFt model gives you more room. The 40 CuFt option is better for smaller loads or tighter vehicle roofs.
Weight
The 40 CuFt soft-shell roof bag weighs 15.7 pounds. The 50 CuFt XXL Heavy-Duty model is heavier at 18 pounds. This difference comes from the extra material needed to cover the larger surface area. Both units are lightweight compared to hard-shell carriers. You can handle either one easily during setup. The 40 CuFt bag is slightly easier to lift and position on your vehicle. The 50 CuFt bag requires a bit more effort due to its size and weight. This difference is minor but noticeable when you are securing the straps alone.
Shell Material
Both products use a soft-shell design made from abrasion-resistant vinyl. The 40 CuFt model is described as a rugged vehicle soft-shell carrier with a waterproof design. The 50 CuFt model is explicitly labeled as Heavy-Duty and constructed from thick vinyl with heat-welded seams. This heat-welded construction is designed to prevent leaks in any weather. Both feature waterproof zippers protected by flaps. The 50 CuFt model emphasizes its durability with the heavy-duty label and specific seam technology. The 40 CuFt model relies on reinforced seams for durability. Both are built to keep gear dry.
Security Features
Both roof bags include a combo lock for security at rest stops. The 40 CuFt model includes one combo lock in its accessory kit. The 50 CuFt model also includes a combo lock. Both kits come with ratchet straps and buckle straps to secure the bag to the vehicle. The 50 CuFt model includes eight hooks in total, while the 40 CuFt model includes six door hooks and two trunk hooks, totaling eight hooks as well. Both provide similar security options. Neither model lists an integrated electronic lock or GPS tracking. The security level is comparable for both units.
Water Resistance
Both products are marketed as waterproof. The 40 CuFt model uses a waterproof design with zippers under a protective flap. The 50 CuFt model also features waterproof zippers tucked under a Velcro-secured flap. The 50 CuFt model highlights heat-welded seams to block rain, snow, mud, and highway grit. The 40 CuFt model mentions reinforced seams for durability against weather. Both are suitable for all-weather travel. The 50 CuFt model’s emphasis on heat-welded seams suggests a potentially more robust seal against water ingress. Both will keep your gear dry in typical rain conditions.
Warranty
Both the 40 CuFt and 50 CuFt models come with a 10-year limited warranty. This warranty covers defects and provides peace of mind for long-term use. Both are backed by a US-based support team. The warranty terms are identical for both products. This is a significant advantage for both options, as many soft-shell carriers offer shorter warranty periods. You get the same level of protection regardless of which size you choose. The warranty does not cover damage from improper installation or accidents. Both brands stand behind their products for a decade.
Which Mockins Roof Bag Fits You
You need maximum cargo space for big moves
The 50 CuFt model provides 50 cubic feet of capacity, significantly more than the 40 CuFt version. Its 85-inch length and 50-inch width accommodate bulky items like large tents and multiple suitcases. This extra volume helps you transport more gear for family vacations or cross-country relocations without leaving essentials behind.
You want a lighter bag for easier handling
The 40 CuFt model weighs 15.7 pounds, making it lighter than the 18-pound 50 CuFt alternative. Its smaller 72-inch length and 48-inch width offer a more compact footprint. This reduced weight and size make the bag easier to lift onto your roof and manage during installation, especially if you are packing solo.
You prefer a standard size for regular trips
The 40 CuFt bag offers 40 cubic feet of storage, which suits most weekend trips and moderate luggage loads. Its 72x48x20 inch dimensions fit well on standard car roofs. You get the same waterproof vinyl construction and secure mounting system as the larger model, but with a size that is easier to store when not in use.
The products compared
Mockins 40 cu ft XXL Soft-Shell Roof Bag
Best for: Vehicles without roof racks needing moderate storage
- Capacity
- 40 cu ft
- Shell Type
- Soft shell (vinyl)
- Water Resistance
- Waterproof
- Security
- Combo lock
- Installation
- Buckle/ratchet straps, door hooks
- Vehicle Compatibility
- With or without roof rack
View on Amazon: Mockins 40 cu ft XXL Soft-Shell Roof Bag Affiliate link
The Mockins 40 CuFt XXL offers 72 x 48 x 20 inches of soft-shell storage. It weighs 15.7 pounds and provides 40 cubic feet of capacity. The waterproof vinyl shell includes reinforced seams and waterproof zippers. It mounts to vehicles with or without crossbars using included straps and hooks. This bag suits travelers needing extra space for suitcases or gear on trips.
Pros
- 40 cubic feet of storage capacity
- Waterproof vinyl shell with reinforced seams
- Mounts to vehicles without crossbars
- Includes roof mat and carry bag
Cons
- Smaller 40 cu ft capacity than the 50 cu ft model
- Soft-shell design offers less rigid protection than hard cases
- Manual ratchet and buckle installation required
Good fit if
- You need extra storage for a single large trip
- Your vehicle lacks roof racks or crossbars
- You prefer a lightweight bag that packs away easily
Skip if
- You require maximum security for high-value items
- You need to carry more than 40 cubic feet of gear
- You want a rigid shell for better aerodynamics
Verdict: Mockins 40 CuFt XXL Soft-Shell Roof Bag is a practical solution for drivers without roof racks who need moderate extra space. It fits those prioritizing waterproof storage and easy setup over rigid protection.
Mockins 50 CuFt XXL Heavy-Duty Roof Bag
Best for: Large loads on vehicles without roof racks
- Capacity
- 50 cu ft
- Shell Type
- 500D vinyl soft-shell
- Water Resistance
- Waterproof
- Security
- Combo lock
- Installation
- Straps and hooks
- Vehicle Compatibility
- Without roof rack
View on Amazon: Mockins 50 CuFt XXL Heavy-Duty Roof Bag Affiliate link
This is a 50 cubic foot soft-shell cargo bag measuring 85 by 50 by 20 inches. It weighs 18 pounds and uses a vinyl shell with heat-welded seams for waterproof protection. The design requires no roof rack, using straps and hooks for mounting. It includes a combo lock for security. This carrier suits you if you need maximum volume for large family trips or moving gear without a factory rack system.
Pros
- 50 cubic foot capacity for large loads
- Waterproof vinyl shell with heat-welded seams
- Mounts without a roof rack using included straps
- Includes combo lock for security
Cons
- 85-inch length may overhang smaller vehicles
- Soft vinyl shell offers less impact protection than hard cases
- 18-pound weight adds significant load to vehicle roof
Good fit if
- You need to transport bulky items like tents and sleeping bags
- Your vehicle lacks a roof rack system
- You require a waterproof seal for wet weather travel
Skip if
- You drive a compact car with limited roof width
- You prefer a rigid shell for better aerodynamics
- You need a carrier that fits under low garage doors
Verdict: Mockins 50 CuFt XXL Roof Bag provides substantial storage for those without roof racks. It fits you if you prioritize volume and weather resistance over the aerodynamic efficiency of a hard shell.
Specifications side by side
| Spec | Mockins 40 cu ft XXL Soft-Shell Roof Bag | Mockins 50 CuFt XXL Heavy-Duty Roof Bag |
|---|---|---|
| Capacity | 40 cu ft | 50 cu ft |
| Shell Type | Soft shell (vinyl) | 500D vinyl soft-shell |
| Water Resistance | Waterproof | Waterproof |
| Security | Combo lock | Combo lock |
| Installation | Buckle/ratchet straps, door hooks | Straps and hooks |
| Vehicle Compatibility | With or without roof rack | Without roof rack |
| Dimensions | 72 x 48 x 20 in | 85 x 50 x 20 in |
| Recommended Use | Suitcases, sleeping bags | Tents, sleeping bags, suitcases |
| Vehicle Type | Car, SUV, Truck, Van | Car |
| Mount Type | Roof Mount | Roof Mount |
| Lockable | not stated | Lockable |
| Weight | 15.7 pounds | 18 pounds |
| Size | 40 Cubic Feet | 50 Cubic Feet |
| Color | Black/Orange | Black |
| Model | MA-RB-40BLK-89-V2 | MA-RB-50BLK-85X50-94-V1-LOC |
Frequently asked questions
Which roof bag is better for a small sedan without racks?
The Mockins 40 CuFt XXL is the better fit for small sedans. Its 48-inch width and 72-inch length are more manageable on smaller vehicle roofs. The 50 CuFt model is wider and longer, which may overhang significantly on compact cars. You should choose the 40 CuFt version for better stability and coverage on smaller frames.
Do both models require a roof rack to install?
No, neither model requires a roof rack. Both are soft-shell bags designed for vehicles without existing racks. They use straps and hooks to secure directly to the vehicle. The package includes a roof mat to protect your paint. You can install either bag on bare roof rails or directly on the car body.
How much heavier is the 50 CuFt model compared to the 40 CuFt?
The 50 CuFt model weighs 18 pounds, while the 40 CuFt model weighs 15.7 pounds. This is a difference of 2.3 pounds. The extra weight comes from the larger fabric surface area and additional material needed for the increased volume. Both weights are light enough for one person to handle during installation.
Is the 50 CuFt bag too long for standard SUVs?
The 50 CuFt bag is 85 inches long. This length fits most standard SUVs and minivans. However, it may extend beyond the roofline on smaller crossovers. The 40 CuFt bag is 72 inches long, offering more clearance on shorter vehicles. Check your vehicle’s roof length before choosing the larger option for a secure fit.
What color options are available for these roof bags?
The 40 CuFt model comes in Black/Orange. The 50 CuFt model is available in Black. Both colors are designed for visibility and style. The orange accents on the 40 CuFt version may offer higher visibility against dark roofs. Choose the color that best matches your vehicle’s aesthetic or your preference for visibility.
Can I use the 40 CuFt bag on a truck with a rack?
Yes, you can use the 40 CuFt bag on a truck with a rack. Although it is marketed for vehicles without racks, it mounts securely using straps. The soft-shell design adapts to various roof shapes. However, if you already have a rack, a hard shell might be more aerodynamic. The bag still functions effectively in this setup.