ARKSEN 31.5 Cu Ft Extra-Wide Alternatives: 6 Similar Picks Compared

How each alternative compares

Sailnovo 21 cu ft Soft Roof Bag

The Sailnovo 21 Cu Ft Soft Roof Bag offers a lighter, more compact option than the ARKSEN. It weighs only 8.16 pounds and stores in a small package when not in use. However, it sacrifices 10.5 cubic feet of capacity and is narrower at 7.09 inches wide. This model is ideal for drivers who need moderate extra space without the bulk of a hard carrier. It provides a waterproof solution for cars without racks, making it a practical choice for those prioritizing portability over maximum volume. You get reliable protection for everyday loads, though it cannot hold the same amount of bulky luggage as the wider ARKSEN model.

RoofPax 19 cu ft Polyester Roof Bag

The RoofPax 19 Cu Ft Polyester Roof Bag is designed for vehicles without roof racks, using patented door hook straps for secure mounting. It is narrower at 35.4 inches and offers less volume than the ARKSEN. This model suits drivers who value secure mounting solutions over raw storage space. It provides reliable waterproof storage for moderate loads, making it a good fit for smaller cars or shorter trips. You trade significant capacity and width for a specialized mounting system that works on bare roofs. If you do not have a roof rack, this bag provides a secure alternative, though it holds fewer suitcases than the extra-wide ARKSEN option.

Asinking 20 cu ft Waterproof Roof Bag

The Asinking 20 Cu Ft Waterproof Roof Bag provides lockable security, a feature not explicitly listed for the ARKSEN. It is narrower at 40 inches and has less capacity, making it less suitable for large families. This model is best for cars without roof racks that need waterproof storage with added security. You gain peace of mind with lockable hardware but lose volume and width compared to the ARKSEN. It is a solid choice for solo travelers or couples who need secure, weather-resistant storage without the massive footprint of wider alternatives. The trade-off is clear: you get enhanced security features in exchange for reduced cargo space.

BagMate 23 cu ft Roof Bag – 840D PVC

The BagMate 23 Cu Ft Roof Bag uses 840D PVC material for durability, which is heavier than the ARKSEN's 500D tarpaulin. It offers less volume and is narrower at 44.9 inches. This model fits drivers who need a lightweight, waterproof soft-shell for vehicles without roof racks. It provides solid capacity for short trips but lacks the width of wider alternatives. You get a robust material construction that resists wear, though you sacrifice some storage space. It is a practical choice for sedans or smaller SUVs where the ARKSEN's extra width might be excessive. The BagMate balances durability and capacity for moderate hauling needs.

Kingfun 20 cu ft Roof Bag

The Kingfun 20 Cu Ft Waterproof Roof Bag is a versatile option for bare roofs, focusing on waterproof performance. It has significantly less capacity than the ARKSEN and is narrower. This model suits drivers who need a reliable, waterproof bag for moderate cargo needs without requiring massive space. You get a straightforward, weather-resistant solution that is easy to mount. The trade-off is a substantial reduction in volume, making it less ideal for large families or bulky items. It is a practical choice for those who prioritize a secure, dry storage solution over maximum capacity. The Kingfun model offers a balanced approach for everyday use without the bulk of larger alternatives.

MCBD 40 cu ft Soft-Shell Roof Bag

The MCBD 40 Cu Ft Soft-Shell Roof Bag offers the highest capacity among soft bags, exceeding the ARKSEN's volume. It is designed for maximum storage on wide roofs, making it ideal for travelers needing extra space. This model suits those who prioritize volume over rigid protection. You gain 8.5 cubic feet of additional storage, allowing you to haul more luggage or gear. The trade-off is a larger footprint and potentially less stability on narrower racks. It is the best choice for wide roofs where the ARKSEN might feel cramped. The MCBD model provides superior capacity for long trips or large families, making it a strong alternative if space is your primary concern.

Quick picks

Our 7 picks

1 Best overall

ARKSEN 31.5 Cu Ft Extra-Wide Roof Bag

Best for: Carrying bulky luggage on wide racks

Capacity

31.5 cubic feet

Shell Type

500D PVC tarpaulin

Water Resistance

waterproof

Dimensions

62.2 x 48.43 x 18.11 in

Vehicle Type

Car

Mount Type

Roof Mount

View on Amazon: ARKSEN 31.5 Cu Ft Extra-Wide Roof Bag Affiliate link

This 31.5 cubic feet roof bag measures 62.2 x 48.43 x 18.11 inches. It uses 500D PVC tarpaulin with waterproof zippers under a flap. The 48.4-inch width holds more gear than standard bags. You get 10 reinforced straps and an anti-slip mat. It fits roof racks on cars. The extra width helps you load bulky items like suitcases and tents securely.

Pros

• 31.5 cubic feet capacity holds 6-9 suitcases
• 48.4-inch width offers extra storage space
• 500D PVC tarpaulin shell resists wear and UV fade
• Waterproof zippers hidden under a protective flap
• Includes 10 reinforced straps and anti-slip mat

Cons

• 17.5-pound weight adds to roof load
• Soft-shell design lacks rigid structure
• No rigid lid for top access

Good fit if

• You need to carry more than 20 cubic feet of gear
• You have a wide roof rack or crossbars
• You want waterproof protection for bulky luggage

Skip if

• You prefer a hard-shell carrier for security
• Your roof rack width is under 48 inches
• You need a rigid lid for quick access

Verdict: ARKSEN 31.5 Cu Ft Extra-Wide Roof Bag fits drivers who need maximum volume on a standard roof rack. It works well for families moving large items like tents and suitcases.

2 Best 21 cubic feet

Sailnovo 21 cu ft Soft Roof Bag

Best for: cars without roof racks needing moderate space

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 is a 21 cubic foot soft-shell roof cargo carrier. It weighs 8.16 pounds and uses tie-down straps for installation. The bag is waterproof and fits cars without roof racks. You get a flexible storage option that packs down small. It suits drivers who need extra space but lack hard rack systems.

Pros

• 21 cubic feet of storage capacity
• Waterproof soft-shell construction
• Lightweight at 8.16 pounds
• Fits cars without roof racks

Cons

• Smaller capacity than the 31.5 cu ft ARKSEN
• Soft shell offers less rigid protection
• Lower volume than the 40 cu ft alternative

Good fit if

• You drive a car without roof racks
• You need moderate extra storage space
• You prefer a lightweight, packable bag

Skip if

• You require maximum cargo volume
• You need rigid hard-shell protection
• You already have a full roof rack system

Verdict: Sailnovo 21 Cu Ft Soft Roof Bag provides a lightweight, waterproof solution for cars without racks. It fits drivers who need moderate extra space without the bulk of a hard carrier.

3 Best premium

RoofPax 19 cu ft Polyester Roof Bag

Best for: mounting on vehicles without roof racks

Capacity

19 Cubic feet

Shell Type

polyester

Water Resistance

100% waterproof

Installation

door hook straps, 10 straps

Vehicle Compatibility

fits cars with or without roof rack

Dimensions

47.2 x 35.4 x 19.8 in

View on Amazon: RoofPax 19 cu ft Polyester Roof Bag Affiliate link

The RoofPax 19 Cu Ft Rooftop Cargo Carrier offers 19 cubic feet of storage in a compact 47.2 x 35.4 x 19.8 inch shell. It is made from 100% waterproof polyester with double zippers and seams. You can mount it using the patented 4-door hook straps or standard crossbars. This bag weighs 12.4 pounds and fits vehicles with or without roof racks.

Pros

• Patented 4-door hook straps for secure mounting
• 100% waterproof polyester shell with double zippers
• Fits vehicles with or without roof racks
• Includes 10 sturdy straps for side and back connection

Cons

• 19 cubic feet capacity is smaller than the 31.5 Cu Ft ARKSEN bag
• 35.4 inches width is narrower than the 40 Cu Ft alternative
• 12.4 pounds weight is heavier than some competitors

Good fit if

• You need a bag that mounts without roof racks
• You prioritize waterproof polyester over PVC materials
• You have a smaller vehicle or limited roof space

Skip if

• You require maximum capacity above 20 cubic feet
• You need a wider bag for bulky items
• You prefer a lighter bag under 10 pounds

Verdict: RoofPax 19 Cu Ft Rooftop Cargo Carrier is a secure option for drivers without roof racks who need reliable waterproof storage. It suits those who value the patented door hook straps over raw volume.

4 Best budget

Asinking 20 cu ft Waterproof Roof Bag

Best for: Cars without roof racks needing waterproof storage

Capacity

20 cu ft

Shell Type

900D PVC tarpaulin

Water Resistance

100% waterproof

Security

Lock

Installation

Metal ring strap design

Vehicle Compatibility

With or without roof rack

View on Amazon: Asinking 20 cu ft Waterproof Roof Bag Affiliate link

This soft-shell carrier offers 20 cubic feet of storage with a 40-inch width. It uses 900D PVC tarpaulin with triple-reinforced seams for 100% waterproof protection. The metal ring strap design allows installation on vehicles with or without roof racks. Its aerodynamic shape aims to reduce wind noise and improve fuel efficiency. You get a lockable design for security and thick pads to protect your car's finish.

Pros

• 900D PVC tarpaulin shell with triple-reinforced seams
• 100% waterproof with double-flap zipper protection
• Fits vehicles with or without roof racks
• Metal ring strap design for easy installation
• Lockable for added security

Cons

• 20 cubic feet capacity is smaller than the 31.5 cu ft alternative
• 40-inch width is narrower than the extra-wide 31.5 cu ft option
• Soft shell offers less rigid protection than hard cases

Good fit if

• You need a waterproof bag that fits cars without roof racks
• You prefer a narrower profile for smaller vehicles
• You want a foldable carrier for easy storage

Skip if

• You require extra-wide capacity for large loads
• You need a rigid hard-shell box for maximum impact protection
• You want a carrier larger than 20 cubic feet

Verdict: Asinking 20 Cu Ft Waterproof Roof Bag provides a secure, waterproof solution for cars without racks, though its 20 cu ft capacity and 40-inch width limit its use for larger loads compared to wider alternatives.

5 Also great

BagMate 23 cu ft Roof Bag – 840D PVC

Best for: sedans without roof racks

Capacity

23 cu ft

Shell Type

840D PVC

Water Resistance

100% waterproof

Dimensions

55" L x 44.9" W x 19.5" H

Vehicle Type

Car, SUV

Mount Type

Roof Mount

View on Amazon: BagMate 23 cu ft Roof Bag – 840D PVC Affiliate link

The Bagmate offers 23 cubic feet of storage with a 44.9-inch width. It uses 840D PVC fabric and heat-welded seams for waterproof protection. The design includes door hooks for rack-free installation. This soft-shell carrier weighs 13.1 pounds. It suits drivers needing moderate extra space without a roof rack.

Pros

• 23 cubic feet capacity holds up to 8 medium suitcases
• 44.9-inch width provides ample side-to-side space
• 840D PVC shell with heat-welded seams ensures waterproofing
• Includes door hooks for universal no-rack installation

Cons

• 23 cubic feet is smaller than the 40 cubic feet option
• 44.9-inch width is narrower than the 31.5 cu ft ARKSEN alternative
• Soft-shell design offers less rigid protection than hard cases

Good fit if

• You need a roof bag for a sedan without a rack
• You want a waterproof carrier under 14 pounds
• You require moderate storage for weekend trips

Skip if

• You need maximum width for large gear
• You require over 30 cubic feet of space
• You prefer a rigid hard-shell carrier

Verdict: Bagmate 23 Cu Ft Roof Bag fits drivers who need a lightweight, waterproof soft-shell for vehicles without roof racks. It provides solid capacity for short trips but lacks the width of wider alternatives.

6 Also great

Kingfun 20 cu ft Roof Bag

Best for: Bare roof mounting with moderate cargo needs

Capacity

20 cu ft

Shell Type

Soft-shell

Water Resistance

Waterproof

Security

Locks

Installation

Straps and door hooks

Vehicle Compatibility

With or without roof racks

View on Amazon: Kingfun 20 cu ft Roof Bag Affiliate link

The Kingfun 20 Cu Ft roof bag offers a middle-ground capacity between the smaller 19–21 cubic foot options and the larger 40 cubic foot bag. It features triple-strength waterproof material and a covered zipper to keep gear dry. You can mount it on bare roofs using door hooks, making it versatile for vehicles without existing racks. The included anti-slip mat helps maintain stability at highway speeds.

Pros

• 20 cubic feet of cargo space
• Triple-strength waterproof shell with covered zipper
• Mounts on bare roofs using door hooks
• Includes anti-slip mat for stability

Cons

• Smaller capacity than the 40 cubic foot option
• No hard-shell protection against impacts
• Relies on straps and hooks rather than integrated rack mounts

Good fit if

• You need a universal fit for a bare roof
• You want more space than a 19 cubic foot bag
• You prioritize waterproof protection for outdoor gear

Skip if

• You require maximum capacity for large loads
• You prefer a rigid hard-shell carrier
• Your vehicle has integrated roof rails and you want a direct mount

Verdict: Kingfun 20 Cu Ft Waterproof Roof Bag fits drivers who need a versatile, waterproof bag for bare roofs but do not require the massive space of the 40 cubic foot alternative.

7 Best with bag

MCBD 40 cu ft Soft-Shell Roof Bag

Best for: maximum storage volume on wide roofs

Capacity

40 cu ft

Shell Type

soft-shell, 900D PVC tarpaulin

Water Resistance

100% waterproof

Security

combination lock

Dimensions

72 x 48 x 20 in

Vehicle Type

Car, SUV

View on Amazon: MCBD 40 cu ft Soft-Shell Roof Bag Affiliate link

This MCBD roof bag offers 40 cubic feet of storage, making it one of the largest options in this guide. It features a 900D PVC tarpaulin shell that is 100% waterproof. The soft-shell design folds for easy storage and includes a protective mat, ratchet straps, and a combination lock. It fits vehicles with side rails, cross bars, or no rack at all.

Pros

• 40 cubic feet capacity is the largest on this list
• 100% waterproof 900D PVC tarpaulin shell
• Includes combination lock for zipper security
• Fits vehicles with or without roof racks

Cons

• Soft-shell design is less rigid than hard carriers
• Does not include a hard-shell protective cover
• Requires manual ratchet strap tightening

Good fit if

• You need maximum storage volume for long trips
• You drive an SUV without roof rails
• You want a waterproof bag that folds flat

Skip if

• You prefer a rigid hard-shell carrier
• You need a built-in locking mechanism
• You have a roof width under 68 inches

Verdict: MCBD 40 Cu Ft Soft-Shell Roof Bag is the best choice for travelers needing the highest capacity among soft bags. It suits those with wide roofs who prioritize volume over rigid protection.

Specifications side by side

Frequently asked questions

See also

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