Extra luggage can make an already crowded vehicle uncomfortable, especially on family road trips, ski weekends, and long-distance moves. The best car roof cargo boxes with locks add valuable storage space while keeping gear protected and accessible.
This roundup compares 10 lockable rooftop carriers by capacity, weather protection, opening design, security features, and practical fit considerations. Use the guide below to narrow your choices based on your vehicle, cargo, and travel plans.
Best 10 Car Roof Cargo Boxes with Locks Picks for 2026
Best Overall Value
13 Cu. Ft. Locking Roof Cargo Box
- 13 cu. ft. capacity with 130-lb. listed load capacity
- Dual-side access and tool-free crossbar installation
- Safety keys release only when fully locked
Best For: Families and travelers needing flexible, lockable storage
Best Weather Protection
10 Cu. Ft. Weatherproof Cargo Carrier
- Weatherproof HDPE hard shell with weather-tight seal
- Dual-side opening and locking system
- No-tool setup with included mounting hardware
Best For: Road trippers prioritizing weatherproof luggage storage
Best for Everyday Trips
- 450 liters of space and 75-kg load capacity
- Dual-side opening with tool-free torque-indicator mounting
- Forward position helps preserve full trunk access
Best For: Drivers making regular trips with luggage or sports gear
Best for Maximum Capacity
- 18 cu. ft. capacity for up to four campers
- SKS lock secures both gear and box to vehicle
- Fits skis and snowboards up to 195 cm
Best For: Groups and winter-sports users needing maximum storage
Classic Rear-Access Pick
- 18 cu. ft. capacity and 100-lb. load limit
- Rear opening keeps loading away from traffic
- Tool-free mounting and included lock
Best For: Families needing maximum storage and rear access
Secure Red Travel Option
14-Cubic-Foot Hard Shell Roof Box
- 14 cu. ft. capacity with 130-lb. stated limit
- Dual-side opening for flexible loading
- Security lock and tool-free brackets
Best For: Road trips requiring easy access and secure storage
High-Capacity Dual-Access Value
- 14-cu.-ft. version with 165-lb. stated capacity
- Dual-side opening with two keys and straps
- Waterproof, UV-resistant ABS shell
Best For: Travelers wanting spacious, flexible-access storage
Best Value Lockable Cargo Box
Universal 11-Cubic-Foot Carrier
- Key lock and waterproof ABS shell
- 110-pound evenly supported capacity
- Includes mounting brackets and hardware
Best For: Travelers needing secure, weather-resistant roof storage
Best Glossy-Finish Option
DNA Motoring Lockable Roof Box
- 11 cubic feet of lockable storage
- Side opening for convenient loading
- Impact-resistant ABS construction
Best For: Road-trippers storing bulky luggage securely
Best Capacity and Access
- 12 cubic feet of storage
- Dual-sided opening for easier access
- Waterproof, UV-resistant ABS shell
Best For: Families needing larger, two-sided roof storage
Best Overall Value – 13 Cu. Ft. Locking Roof Cargo Box
For shoppers comparing car roof cargo boxes with locks, this hard-shell carrier offers a practical balance of capacity, access, and installation convenience. Its 13-cubic-foot interior holds bulky travel gear, while the dual-side opening and tool-free mounting make it easier to use on road trips.
Best For: Families and travelers who want a versatile, lockable roof box with generous storage and straightforward installation.
Pros:
- 13 cubic feet of storage with a listed 130-pound load capacity
- Dual-side opening allows loading from either side of the vehicle
- Safety-key system releases the keys only when the box is fully locked
- Tool-free mounting fits round, square, and aerodynamic crossbars
Cons:
- The large 56-inch size may require careful roof and garage clearance planning
- Listed as water resistant rather than waterproof
Its impact-resistant ABS+PC shell, weather-resistant construction, and universal crossbar fit make this a well-rounded option for general luggage and camping gear. Confirm your vehicle’s crossbar compatibility and roof-load limits before installation.
Best Weather Protection – 10 Cu. Ft. Weatherproof Cargo Carrier
This 10-cubic-foot carrier is a straightforward choice among car roof cargo boxes with locks, combining a hard HDPE shell with weatherproof storage. Its dual-side opening and locking system help make loading convenient while keeping luggage enclosed during travel.
Best For: Road trippers who prioritize weatherproof hard-shell storage and easy access from either side of the car.
Pros:
- Weatherproof hard-shell construction with a weather-tight seal
- Dual-side opening supports loading and unloading from either side
- Dual-side locking system and front latch add closure security
- Includes mounting hardware and requires no tools for assembly
Cons:
- At 10 cubic feet, it offers less storage than the larger options in this roundup
- The supplied details list a vehicle-specific fit rather than universal fit
- The listed warranty is 30 days
With a 110-pound capacity and a relatively light empty weight of 24.5 pounds, this box is designed for practical luggage storage without an overly complex setup. Check the vehicle-specific fit and mounting requirements before buying.
Best for Everyday Trips – Thule Pulse 2 L Roof Box
The Thule Pulse 2 L is a streamlined option for shoppers seeking car roof cargo boxes with locks for commuting, day trips, and weekend travel. It provides 450 liters of space, dual-side access, and a tool-free attachment system with a torque indicator for installation feedback.
Best For: Drivers who want a durable, streamlined roof box for luggage, skis, snowboards, and recurring weekend use.
Pros:
- 450 liters of cargo space with a 75-kilogram load capacity
- Dual-side opening makes gear accessible from either side
- Tool-free attachment system includes a torque indicator
- Forward positioning is designed to preserve full trunk access
Cons:
- The supplied details do not rate it as water resistant
- Its 81-inch length may be substantial for some vehicles or storage spaces
- The notes do not specify a lock type or included keys
Its ASA-ABS construction is described as resistant to sun, scratches, and weather, while the streamlined design suits a wide range of modern vehicles. Verify roof-bar compatibility and the box’s closure details if a specific locking setup is essential.
Best for Maximum Capacity – Yakima SkyBox NX 18 XLG
For buyers comparing large car roof cargo boxes with locks, the Yakima SkyBox NX 18 XLG stands out with 18 cubic feet of storage and an SKS locking system. Its dual-sided opening and flattened interior floor make it especially suited to bulky travel and recreational equipment.
Best For: Larger groups, campers, and winter-sports users who need maximum listed capacity and space for long skis or snowboards.
Pros:
- Generous 18-cubic-foot capacity for up to four campers
- Accommodates skis and snowboards up to 195 centimeters
- Full-metal handle locks both the gear inside and the box to the vehicle
- Dual-sided opening and universal mounting simplify everyday use
Cons:
- At 53 pounds empty, it is heavier than several smaller carriers
- The 84-inch length requires careful vehicle and storage-space planning
- The supplied details list it as not water resistant
The unobstructed flattened floor is designed to improve usable space, while the NX nano-texture gives the lid and base a clean finish. Because of its large dimensions and weight, confirm your vehicle’s roof capacity, crossbar fit, and clearance before purchase.
Classic Rear-Access Pick – SportRack Vista XL Cargo Box
For shoppers comparing car roof cargo boxes with locks, the SportRack Vista XL stands out for its generous 18-cubic-foot capacity and rear-opening design. Its UV-resistant ABS construction, tool-free mounting hardware, and included lock make it a practical choice for family trips and everyday hauling.
Best For: Families needing maximum storage and rear access away from traffic.
Pros:
- Large 18-cubic-foot internal capacity with a 100-pound load limit
- Rear opening provides access away from passing traffic
- Tool-free hardware supports easier installation and removal
- Lock secures both the box and its contents
Cons:
- Its 63-inch length and 38-inch width require careful roof-fit checking
- Rear access may be less convenient than dual-side opening designs
The Vista XL is a strong capacity-first option, especially if rear loading suits your vehicle and parking habits. Confirm crossbar spacing and rack compatibility before purchase.
Secure Red Travel Option – 14-Cubic-Foot Hard Shell Roof Box
This red hard-shell carrier is a practical contender among car roof cargo boxes with locks, combining 14 cubic feet of storage with dual-side access. Its security system, tool-free brackets, and weather-resistant ABS and PMMA construction are suited to road trips with bulky luggage or outdoor gear.
Best For: Road-trip travelers who want dual-side loading and a high stated weight capacity.
Pros:
- 14 cubic feet of storage with a stated 130-pound capacity
- Opens from both sides for more flexible loading
- Locking system releases the keys only when locking points are sealed
- Pre-assembled, tool-free brackets fit round, square, and most aerodynamic bars
Cons:
- Only a one-year manufacturer warranty is listed
- The glossy red finish may not suit every vehicle
Choose this model when easy access from either side and a prominent security feature matter more than maximum cargo volume. Check your vehicle’s roof-bar compatibility and load limits.
High-Capacity Dual-Access Value – GarveeTech Rooftop Cargo Box
The GarveeTech rooftop carrier offers a useful combination of capacity, weather protection, and dual-side access for shoppers seeking car roof cargo boxes with locks. Its hard ABS shell is described as waterproof and UV resistant, while the aerodynamic shape is intended to reduce noise and fuel consumption.
Best For: Drivers wanting a spacious black box with dual-side access and included keys and straps.
Pros:
- 14-cubic-foot version provides substantial extra storage
- Dual-sided opening allows access from either side of the vehicle
- Waterproof, UV-resistant ABS shell protects gear from weather
- Includes two keys and two straps, with a 165-pound stated capacity
Cons:
- Compatibility depends on having a suitable roof rack
- The product information lists 12- and 14-cubic-foot versions, so configuration should be verified
- A one-year warranty is listed
This is a flexible option for travelers prioritizing access and stated load capacity. Verify the selected size, rack fit, and vehicle roof limits before ordering.
Best Value Lockable Cargo Box – Universal 11-Cubic-Foot Carrier
If you need car roof cargo boxes with locks for added luggage space, this hard-shell carrier offers a practical combination of weather protection, capacity, and straightforward mounting. It fits vehicles with crossbars and includes mounting brackets and hardware.
Best For: Travelers who want a lockable, waterproof roof box with 11 cubic feet of storage and a textured, non-slip finish.
Pros:
- Key lock helps secure stored luggage.
- Waterproof ABS shell is designed for rainy, dirty, and freezing conditions.
- 110-pound capacity and 53-by-34-by-15-inch dimensions provide substantial extra space.
- Includes four mounting brackets, hardware, and a pair of keys.
Cons:
- Requires a vehicle equipped with crossbars.
- At 50.3 pounds, it is heavier than some comparable carriers.
This is a solid choice when secure storage and weather resistance matter more than minimizing carrier weight. Confirm your crossbar setup and roof-load limits before buying.
Best Glossy-Finish Option – DNA Motoring Lockable Roof Box
For shoppers comparing car roof cargo boxes with locks, this DNA Motoring model combines an 11-cubic-foot interior with a heavy-duty ABS shell and side-opening access. It is designed for vehicles with crossbars and includes the key, lock, brackets, and mounting hardware.
Best For: Road-trippers who want a glossy black carrier with lockable storage and room for bulky items.
Pros:
- Key-and-lock system helps protect valuables and supports lid alignment.
- Offers 11 cubic feet of storage with a 110-pound maximum when evenly distributed.
- Side opening stays open until closed, making loading more convenient.
- Impact-resistant ABS construction helps shield contents from inclement weather.
Cons:
- Fits vehicles with crossbars only.
- Listed as water resistant rather than waterproof.
- Glossy finish may show dirt and scratches more readily than a textured surface.
Its capacity and locking system make it a practical everyday travel carrier, while the side-opening design can simplify packing. Check crossbar compatibility and distribute cargo evenly to stay within the stated limit.
Best Capacity and Access – Garvee Dual-Side Roof Box
This Garvee carrier stands out among car roof cargo boxes with locks for its dual-sided opening and 12-cubic-foot capacity. Its hard ABS shell is waterproof and UV resistant, and it is intended for cars, vans, and SUVs equipped with a roof rack.
Best For: Families and road-trippers who prioritize larger storage, access from either side, and included keys and straps.
Pros:
- Dual-sided opening allows access from either side of the vehicle.
- Provides 12 cubic feet of storage with a listed 165-pound maximum capacity.
- Waterproof, UV-resistant ABS shell is designed for varied weather conditions.
- Includes two keys, two straps, and a one-year warranty claim in the product notes.
Cons:
- Compatibility depends on having a suitable roof rack.
- The instructions specify that one side should be locked when opening the other.
- Product details also list a 30-day manufacturer warranty, so warranty coverage should be confirmed before purchase.
Choose this model when side access and maximum listed capacity are priorities. Before loading to its stated limit, verify your vehicle and roof-rack weight ratings, as those limits may be lower.
How We Picked These Car Roof Cargo Boxes with Locks
We focused on hard-shell rooftop carriers that provide a locking feature or security lock and offer useful protection from road spray, rain, and everyday travel conditions. The selection spans approximately 10 to 18 cubic feet, including compact models for occasional use and larger boxes for families or bulky soft goods.
We also considered opening access, stated weight limits, mounting practicality, vehicle compatibility, and the reputation of established cargo-gear brands. Because included hardware and exact dimensions can vary, confirm the current specifications before ordering.
Quick Comparison
| What to Compare | Best For |
|---|---|
| 10–11 cubic feet | Smaller vehicles, couples, and moderate luggage |
| 13–14 cubic feet | Balanced capacity for general road trips |
| 16–18 cubic feet | Families, bulky luggage, and extended travel |
| Dual-side opening | Convenient loading from either side of the vehicle |
| Rear opening | Situations where side access is limited |
| Lockable hard shell | Added deterrence and protection for stored gear |
Key Buying Factors for Car Roof Cargo Boxes with Locks
Capacity and Exterior Size
Choose capacity according to the items you actually need to carry, not just the largest number available. Measure skis, strollers, coolers, and suitcases, then compare those dimensions with the box’s usable interior. A longer box may suit skis and snowboards, while a wider design can better accommodate several bags.
Vehicle and Roof-Rack Fit
Check the carrier’s mounting range, crossbar spacing, roof-load limit, and clearance requirements. The vehicle’s dynamic roof rating includes the box, rack, and cargo combined. Make sure the tailgate, hatch, antenna, and sunroof can operate safely with the box installed.
Locks, Access, and Weather Protection
A lock helps deter casual access but is not a guarantee against theft. Look for a rigid shell, secure latch alignment, and a lock that works only when the box is fully closed. Dual-side opening can simplify loading in parking lots, while rear opening may work better when adjacent spaces are tight. Weather-resistant seals and a well-fitted lid are essential for clothing and luggage.
Weight, Installation, and Driving Impact
Stay below the carrier’s stated load limit and distribute cargo evenly. Consider whether one person can install or remove the box, especially for large 16- to 18-cubic-foot models. Any rooftop carrier can increase wind noise, fuel consumption, and vehicle height, so drive conservatively and check clearance before entering garages.
Who Should Buy Which Car Roof Cargo Boxes with Locks?
Choose a 10- or 11-cubic-foot box if you need occasional extra luggage space without the bulk of a very large carrier. A 13- or 14-cubic-foot model is a practical middle ground for routine road trips and mixed gear. Families carrying several suitcases, winter clothing, or bulky soft items should consider a 16- to 18-cubic-foot option, provided the vehicle and crossbars support it.
If easy loading is a priority, favor a dual-side-opening design. If your parking setup makes side access difficult, a rear-opening carrier may be more convenient. Whichever model you choose, verify dimensions, mounting hardware, lock operation, and current manufacturer limits before purchasing.