Best Cargo Box For Car: 12–21 Cu Ft Compared

#1 · Best Overall

1. Thule Pulse 2 M Roof Box

Best for: Everyday dual-side Thule storage.

Why it ranks #1: Its 400-liter capacity, dual-side access, and tool-free torque-indicator mount suit everyday journeys, while its listed 75 kg load capacity clarifies the limit.

A tool-free mounting system with a torque indicator that clicks when safely attached makes the Thule Pulse 2 M’s installation process especially clear. Its 400 liters of cargo space and access from either side serve everyday errands, commuting, and short getaways without requiring a tool-based mounting workflow.

The 400-liter capacity and 75-kilogram load limit give buyers useful boundaries for packing luggage, skis, or snowboards. A torque-indicator click confirms secure attachment during tool-free mounting, while the closure confirmation adds another check before driving. Opening from either side helps retrieve items around parking constraints, and the streamlined shape is described as suiting a wide variety of modern vehicles. ASA-ABS plastic supplies the listed hardwearing construction for regular use.

Skip it if you need substantially more than 400 liters; SportRack Vista XL lists 18 cubic feet of capacity.

Choose this for commuting, day trips, and weekend escapes requiring dual-side access and a clear tool-free mounting cue. Keep the 75-kilogram cargo limit in mind when packing heavier equipment.

Listed on Amazon as: Thule Pulse 2 M Roof-Mounted Box, 14 Cubic Ft, Dual-Side Opening

#2 · Best Dual-Side Access

2. Thule Force 3 XL

• Dimensions: 89"L x 18"W x 40"H
• Weight: 65 lb
• Dimensions: 89"L x 18"W x 40"H

Best for: Dual-side access for frequent loading.

Why it ranks #2: It offers access from both sides, a quick mounting system that clicks when secure, and a limited lifetime warranty; its listed weight is 65 pounds.

Access from both sides of the vehicle is the Thule Force 3 XL’s clearest practical advantage, letting passengers reach cargo from either side. Its quick mounting system signals secure attachment with a click, supporting a more confident setup routine for drivers who load and unload often.

The dual-side access makes retrieving gear easier when parking or roadside conditions make one side inconvenient. Thule’s mounting system uses a simple click to indicate the box is safely attached, adding a clear installation cue instead of relying only on visual inspection. The listing describes durability for daily use and active lifestyles, and says the box was tested for road safety and durability at the Thule Test Center. Its 65-pound listed weight is relevant when planning handling and installation.

Skip it if you want a stated cargo volume before choosing; Thule Pulse 2 specifies 400 liters of space.

Choose this for frequent loading where access from either side and a click-confirmed mounting cue matter. The listed 65-pound weight is a practical handling consideration when installing or removing the box.

Listed on Amazon as: Thule Force 3 XL US

#3 · Best Rear Opening

3. SportRack Vista XL

• Dimensions: 62.5 x 39 x 19 in

Best for: Rear-access family gear hauler.

Why it ranks #3: This rigid 18-cubic-foot box opens at the rear, away from traffic, and includes tool-free mounting hardware plus a lock for the contents and rack.

Rear opening lets you reach packed gear from the curbside rear rather than working beside passing traffic. The SportRack Vista XL adds 18 cubic feet of cargo space in a UV-resistant ABS shell, giving road-trip travelers room for extra luggage while keeping it enclosed on the roof.

Its 18-cubic-foot interior can take bulky travel gear, while the rear-opening lid keeps loading and retrieval away from roadside traffic. Tool-free mounting hardware makes installation and removal simpler, and the included lock secures both the contents and the box to the rack. Compatibility includes SportRack systems, square and round bars, and most factory racks; the stated crossbar spacing range begins at 23 5/8 inches, so rack layout remains an important fit consideration.

Skip it if you need dual-side access or a soft bag that packs away; the Sailnovo carrier folds for storage.

Choose this for family trips needing enclosed roof storage and rear access at stops. It suits several rack styles, but check crossbar spacing and the 100-pound load limit against your vehicle and gear.

Listed on Amazon as: SportRack Vista XL Rear Opening Cargo Box,Black

#4 · Best Compact Shell

4. GarveeTech 12-Cubic-Foot Box

• Dimensions: 54.3"L x 31.5"W x 13.4"H
• Weight: 39 lb
• Dimensions: 54.3"L x 31.5"W x 13.4"H

Best for: Compact dual-side hard-shell storage.

Why it ranks #4: The 12-cubic-foot ABS hard shell has dual-side opening, secure straps and keys, and a stated 165-pound capacity in a relatively short 54.3-inch length.

Dual-side opening gives this 12-cubic-foot GarveeTech box access from either side of the vehicle, while its 54.3-inch length keeps the listed footprint relatively compact. The ABS hard shell is described as waterproof and UV-resistant, pairing enclosed storage with stated protection against weather exposure.

The 12-cubic-foot interior and 165-pound stated weight capacity define how much gear this box can carry, while its dimensions help buyers compare roof space. Dual-side opening makes loading more convenient when one side of the vehicle is blocked. ABS construction is described as waterproof and UV-resistant, and the listing says its aerodynamic shape reduces fuel consumption and noise. Secure straps and keys are also specified, combining attachment and access-security features in one hard-shell package.

Skip it if you need more than 12 cubic feet; SportRack Vista XL lists 18 cubic feet of internal capacity.

This fits drivers wanting weather-protective hard-shell storage with access from either side and a 165-pound stated capacity. Its 12-cubic-foot volume makes it less suited to trips requiring substantial bulky cargo.

Listed on Amazon as: GarveeTech Rooftop Cargo Box Carrier,Dual-Side Opening Roof Mount Travel Luggage Storage Capacity,165 LBS Weight Capacity with Secure Straps&Keys, Vehicle Hard-Shell Carriers,Black

#5

5. D SOLUTIONS Hard-Shell Box

• Dimensions: 53"L x 34"W x 15"H
• Weight: 50.3 lb
• Dimensions: 53"L x 34"W x 15"H

Best for: Crossbar-equipped hard-shell users.

Why it ranks #5: This ABS box is listed at 53 by 34 by 15 inches with a 110-pound load rating and fits vehicles with crossbars, according to its listing.

Tool-free assembly and installation are the central convenience here, provided your vehicle has crossbars. The D SOLUTIONS carrier pairs that setup approach with an ABS hard shell, a stated 110-pound load bearing, and dimensions of 53 by 34 by 15 inches for checking available roof space.

Its ABS plastic shell is described as durable and as helping protect contents from inclement weather, giving luggage an enclosed alternative to cabin packing. Tool-free assembly and installation reduce the number of setup steps, while the stated 110-pound load bearing gives buyers a concrete cargo limit to plan around. The fit condition is explicit: it is for vehicles with crossbars only. At 53 by 34 by 15 inches, its footprint also helps assess roof clearance and storage needs.

Skip it if you lack crossbars or need rack-free mounting; MIDABAO states it fits cars with or without racks.

Choose this if your vehicle has crossbars and you want an ABS hard shell with a stated 110-pound bearing limit. Its 53-by-34-inch footprint and crossbar-only fit are key boundaries.

Listed on Amazon as: Hard Shell Roof Top Cargo Carrier Waterproof Travel Luggage Box

#6 · Highest Listed Capacity

6. Maxsa Innovations 21-Cubic-Foot Box

• Dimensions: 68.11"L x 31.89"W x 14.57"H
• Weight: 41.9 lb
• Dimensions: 68.11"L x 31.89"W x 14.57"H

Best for: Lockable 21-cubic-foot hauler.

Why it ranks #6: Its listed 21-cubic-foot capacity is the largest among the hard-shell options; it measures 68.11 inches long and includes a locking system with two keys.

A stated 21-cubic-foot capacity gives this Maxsa hard-shell carrier room for substantial trip cargo, while its locking system and two included keys address securing belongings during travel. Its listed dimensions—68.11 by 31.89 by 14.57 inches—also help shoppers judge roof space before choosing a box.

The 21-cubic-foot title capacity makes this a high-volume option for travelers who want to move luggage out of the cabin. A locking system with two keys adds a way to secure the stored gear, and robust straps are specified for travel security. The listing also promises installation components and clear instructions for setup, though it provides no rack compatibility details here; confirm your roof arrangement against the product’s supplied fit guidance before committing.

Skip it if you need stated rack compatibility or dual-side access; Thule Pulse 2 specifies access from either side.

Consider it if you want a large hard-shell carrier with a lock and straps for road-trip luggage. The listed dimensions help assess roof space, but the supplied details leave rack compatibility unspecified.

Listed on Amazon as: Rooftop Cargo Box Carrier, 21Cu ft Hard Shell Rooftop Cargo Carrier

#7

7. Maxsa Innovations 19.4-Cubic-Foot Box

• Dimensions: 55.12"L x 35.04"W x 16.14"H
• Weight: 39.7 lb
• Dimensions: 55.12"L x 35.04"W x 16.14"H

Best for: Lockable mid-size hard-shell carrier.

Why it ranks #7: The hard-shell carrier title lists 19.4 cubic feet and the product details give dimensions of 55.12 by 35.04 by 16.14 inches, plus a security lock.

A locking system with two keys gives this Maxsa hard-shell carrier a clear security feature for travel gear, while robust straps are specified for securing the box. Its 55.12-by-35.04-by-16.14-inch dimensions provide a concrete footprint for shoppers assessing roof space.

The supplied feature text describes a locking rooftop box with two keys, addressing access to stored belongings during trips. Robust straps are also specified, and the listing says installation components and clear instructions are included to support setup. The title identifies a 19.4-cubic-foot carrier and a 165-pound capacity, useful figures for planning luggage and load. Product dimensions are listed as 55.12 by 35.04 by 16.14 inches, but roof-rack compatibility is not provided in the supplied details.

Skip it if you need published rack compatibility or dual-side opening; Thule Pulse 2 specifies access from both sides.

Consider it for travelers seeking a lockable hard shell with a stated 19.4-cubic-foot capacity and 165-pound limit. Its listed dimensions help with roof-space planning, but compatibility details are not supplied.

Listed on Amazon as: Rooftop Cargo Carrier Box, 19.4Cu ft Hard Shell 165Lbs Capacity

#8

8. Maxsa Innovations 17-Cubic-Foot Box

• Dimensions: 55.12"L x 35.04"W x 16.14"H
• Weight: 35.3 lb
• Dimensions: 55.12"L x 35.04"W x 16.14"H

Best for: Compact lockable hard-shell carrier.

Why it ranks #8: This hard-shell option lists a 165-pound capacity and measures 55.12 by 35.04 by 16.14 inches; its listing also describes a locking system and two keys.

At 55.12 inches long, this Maxsa hard-shell carrier offers a more compact footprint than the brand’s 21-cubic-foot option while listing a 165-pound capacity in its title. Its security lock and two-key system suit travelers who want enclosed roof storage with a specific cargo-security feature.

The 55.12-by-35.04-by-16.14-inch dimensions give shoppers concrete measurements for evaluating roof space, while the title states a 165-pound capacity for carrying gear. A security lock is included, and the related product details describe a locking system with two keys, making access control part of the package. Setup components and clear instructions are mentioned in the supplied feature text, but rack compatibility is not specified, so fit needs separate attention.

Skip it if you need an explicitly stated rack fit or a soft carrier; Sailnovo lists compatibility with most roofs.

This is worth considering for drivers seeking a lockable hard shell and a 165-pound stated capacity in a 55.12-inch length. Check roof compatibility carefully, since the supplied details do not identify supported rack types.

Listed on Amazon as: Rooftop Cargo Carrier Box, 17Cu ft Hard Shell 165Lbs Capacity

#9

9. Sailnovo 20-Cubic-Foot Bag

• Dimensions: 51"L x 39"W x 17"H
• Weight: 8.3 lb
• Dimensions: 51"L x 39"W x 17"H

Best for: Fold-away soft-bag road trips.

Why it ranks #9: The soft bag offers 20 cubic feet and includes extra straps and door hooks, but its fabric construction and roof-type-specific instructions differ from a rigid cargo box.

A stated 20 cubic feet of capacity paired with a folded size of 10 by 5 by 15 inches gives the Sailnovo bag a useful travel-to-storage tradeoff. Its 1000D Oxford cloth body, waterproof zippers, and reinforced stitching target luggage carrying with a soft, packable format.

The 51-by-39-by-17-inch bag is listed to hold four to six medium suitcases, plus camping items such as tents and sleeping bags, making its 20-cubic-foot capacity relevant for longer trips. Heavy-duty buckles, door hooks, and reinforced dual stitching support secure fixation, while waterproof zippers address wet-weather exposure. It fits most roofs, but the supplied guidance notes a crossbar spacing condition and says it requires no sunroof; its compact folded size helps when the bag is off the vehicle.

Skip it if you have a sunroof or want a rigid shell; MIDABAO lists fit for cars with or without racks.

This suits travelers needing soft, high-volume storage that can fold down between trips, with included hooks and straps. Follow its stated roof conditions: the supplied guidance says no sunroof and specifies crossbar spacing.

Listed on Amazon as: Sailnovo Rooftop Cargo Carrier roof Bag, 20 Cuft fit Cars with/Without Rack

#10

10. MIDABAO 20-Cubic-Foot Bag

• Dimensions: 51.1"L x 39"W x 17"H
• Weight: 3.94 kg
• Dimensions: 51.1"L x 39"W x 17"H

Best for: Rack-free soft-bag travelers.

Why it ranks #10: This 20-cubic-foot PVC-nylon roof bag claims fit with or without racks, but its flexible bag design is less aligned with a search for a hard cargo box.

Compatibility with cars both with and without roof racks is the MIDABAO bag’s defining advantage, opening rooftop cargo carrying to drivers without crossbars. Its 20-cubic-foot capacity and waterproof description make it a flexible soft-carrier choice for trips when extra luggage space matters more than a rigid shell.

The 51.1-by-39-by-17-inch bag provides 20 cubic feet of stated carrying capacity, giving travelers room for extra luggage without choosing a hard box. PVC-and-nylon construction and coated, waterproof zippers support its weather-protection role, while the included anti-slip mat is specified as part of the package. Because the listing says it fits cars with or without racks, it offers broader stated mounting flexibility than rack-only carriers; secure installation still depends on following its supplied setup guidance.

Skip it if you want a rigid shell for enclosed roof storage; the SportRack Vista XL uses UV-resistant ABS.

Pick this for drivers needing a large soft carrier that can work with or without roof racks. Its flexible format suits luggage-heavy trips, but buyers seeking a rigid hard-shell box should look elsewhere.

Listed on Amazon as: MIDABAO 20 Cubic Waterproof Duty Car Roof Top Carrier-Car Cargo Roof Top Bag, Waterproof & Coated Zippers includes Anti Slip Mat with or without Racks (20 Cubic Feet)