What Is Lockable? A Guide for Roof Cargo Boxes Buyers (2026)

Understanding Lockable Features for Buyers

When you shop for a roof cargo box, the term lockable is a critical specification. It tells you how the unit secures to your vehicle and protects your gear. This guide breaks down what lockable means in practice for your next purchase.

A lockable roof box has a built-in mechanism that prevents unauthorized access. The lock integrates into the lid or the mounting system. When engaged, it stops anyone from opening the box without the correct key or combination. This feature is essential for transporting valuables like electronics, sports equipment, or documents.

You will see this spec labeled as lockable or key-operated on product listings. Some manufacturers specify the type of lock, such as a cylinder lock or a combination dial. Others simply state that the unit includes a locking system. Always check the detailed specifications to confirm the presence of this feature.

The lock typically works by engaging a bolt or latch into the vehicle’s roof rack crossbars or the box’s base. This creates a physical barrier. Even if the box is not attached to the car, the lock keeps the contents secure. However, the lock does not prevent theft of the entire box from the roof. It only secures the lid.

Buyers care about this spec for peace of mind. You want to know your items are safe while you drive. A reliable lock adds a layer of security. It deters casual thieves who look for easy targets. Without a lock, you must remove your gear every time you park, which is inconvenient.

Ensure the lock mechanism is robust. Look for materials that resist corrosion and wear. A sturdy lock ensures long-term reliability. It should operate smoothly in various weather conditions. Cold temperatures or dirt should not jam the mechanism.

In summary, the lockable spec defines how your cargo box stays closed. It is a fundamental safety feature. Verify this detail before you buy. It ensures your belongings remain secure during transit and while parked.

Lockable Roof Cargo Options

Lockable

A lockable roof box ensures your gear stays secure during transit and when parked. This feature typically involves a keyed mechanism that prevents unauthorized access. You can leave valuable items inside without worry. The Yakima SkyBox NX 16 is a hard-shell example. It uses a lock to secure the lid. This protects skis or snowboards from theft. Soft bags like the Asinking 20 cu ft also offer this. They use integrated locks on the zipper tracks. This stops someone from cutting the bag open. Hard cases like the Eylar SRX-175 provide robust locking points. You get peace of mind on long trips. The trade-off is always carrying keys. You must ensure they are safe. Without a lock, your cargo is vulnerable. This spec is essential for security-conscious buyers.

Lockable

Security remains the primary concern for roof cargo storage. All products listed here feature locking mechanisms. The DNA Motoring 11 cu ft box uses a key lock for side access. This allows secure loading from the vehicle side. The Relaxcabine 13 cu ft hard shell also includes a lock. It secures the dual-side opening lid. SR1 Performance offers a lockable roof bag for Jeep owners. It fits those needing capacity without fixed racks. Each option provides theft deterrence. You do not need to remove gear to lock it. This convenience saves time. The mechanism varies by design. Hard shells often have integrated locks. Soft bags use lockable zippers. Regardless of style, the result is the same. Your items remain safe from casual thieves. This is a standard feature for quality carriers.

Is This Feature Worth It?

Who needs it

You definitely need this specification if you transport high-value items regularly. This includes cameras, laptops, sports equipment, or tools. The primary benefit is theft deterrence. A keyed lock prevents casual opportunists from opening your cargo box while you are shopping or dining. It also provides peace of mind during overnight stops on road trips. If you leave your vehicle unattended in public spaces, this feature is essential. It secures the box to the roof rack, ensuring it cannot be easily removed. For frequent travelers or those living in areas with higher crime rates, this is a non-negotiable safety feature. It transforms your roof box from a simple storage container into a secure vault for your belongings. Prioritize models with robust locking mechanisms that integrate seamlessly with your rack system.

Who can skip it

You can skip this feature if you only carry low-value, bulky items like sleeping bags, camping chairs, or non-essential gear. If your cargo has no resale value, theft is not a concern. You might also skip it if you always park in secure, private garages or fenced driveways. In these cases, the physical security of your home is sufficient. You can prioritize other specifications instead. Focus on volume capacity, aerodynamic design, or ease of installation. These factors often impact fuel efficiency and usability more than security does for low-value cargo. Locking mechanisms add weight and complexity. If you do not need theft protection, saving that weight and cost for better materials or larger size is a smarter choice. Assess your actual risk and cargo value before paying extra for locks.

Lockable Roof Box Glossary

Shell Type

The material construction of the box, such as hard plastic or aluminum. Hard plastic resists dents, while metal offers superior rigidity for heavy loads.

Capacity

The internal volume measured in cubic feet. This number indicates how much gear fits inside, helping you choose a size that matches your storage needs.

Opening

The direction the lid swings, either single-side or double-side. Dual openings allow access from either side of the vehicle for easier loading.

Load Capacity

The maximum weight the box structure can safely hold. Exceeding this limit risks damaging the box or compromising vehicle stability during transit.

Vehicle Type

The specific roof rack system the box is designed to fit. Ensure the mounting hardware matches your crossbars or clamps for a secure installation.

Recommended Use

The intended purpose, such as daily commuting or long-term travel. This guides you toward features like durability or aerodynamic shape for your specific trips.

Water Resistance

The ability to keep rain out via sealed gaskets. Look for high IP ratings to ensure your gear stays dry during heavy downpours.

Security

The locking mechanism that prevents unauthorized access. Keyed locks are standard, but some models offer integrated systems for added theft deterrence.

Quick picks

Our 6 picks

1

Asinking 20 cu ft Waterproof Roof Bag

Best for: Flexible storage and high capacity needs

Lockable

Lockable (what this guide is about)

Capacity

20 cu ft

Shell Type

900D PVC tarpaulin

Water Resistance

100% waterproof

Security

Lock

Installation

Metal ring strap design

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

This is a soft-sided roof cargo bag with a 20 cubic foot capacity. It features a lockable design for security and is made from 100% waterproof 900D PVC tarpaulin. The bag measures 52 inches long and fits vehicles with or without roof racks. It uses metal ring straps for installation. This option suits you if you need flexible storage that folds flat when not in use.

Pros

• 20 cubic feet of cargo capacity
• Lockable for security
• 100% waterproof 900D PVC construction
• Fits vehicles with or without roof racks

Cons

• Soft shell offers less impact protection than hard boxes
• No included mounting hardware for rackless vehicles
• Velcro closure adds wind noise potential

Good fit if

• You need extra space beyond standard roof boxes
• You want a bag that folds flat for storage
• You drive vehicles without existing roof racks

Skip if

• You require rigid protection for fragile items
• You prefer aerodynamic hard-shell designs
• You need a permanent, low-profile mount

Verdict: Asinking 20 cu ft Lockable Roof Cargo Bag provides high capacity and weather protection for flexible loading needs. It fits buyers who prioritize volume and packability over rigid shell durability.

2

SR1 Performance 20 Cu Ft Roof Bag with Jeep Logo

Best for: carrying large loads without a fixed roof rack

Lockable

Lockable (what this guide is about)

Capacity

20 Cu Ft

Shell Type

PVC

Water Resistance

100% Waterproof

Security

Combination lock

Installation

Straps and hooks, anti-slip mat

View on Amazon: SR1 Performance 20 Cu Ft Roof Bag with Jeep Logo Affiliate link

This soft-shell cargo bag offers 20 cubic feet of capacity, measuring 44 by 34 by 17 inches. It features 100% waterproof PVC construction with welded seams to protect gear from rain and snow. The design includes a combination lock for security and installs using straps, hooks, and an anti-slip mat. It fits most cars and SUVs, including Jeeps. This option suits buyers who need high volume and flexible storage that folds flat when not in use.

Pros

• 20 cubic feet capacity holds 4-6 suitcases
• 100% waterproof PVC with welded seams
• Includes combination lock for security
• Fits vehicles with or without roof racks
• Folds flat for compact storage

Cons

• Soft PVC shell offers less impact protection than hard shells
• Combination lock is less convenient than keyed systems
• Strap and hook installation is less secure than integrated carriers

Good fit if

• You need maximum cargo volume for long trips
• You want a bag that folds flat for storage
• Your vehicle lacks a permanent roof rack system

Skip if

• You prefer a rigid shell for better aerodynamics
• You want keyed locks for faster access
• You need a permanent, low-profile installation

Verdict: SR1 Performance 20 Cu Ft Waterproof Roof Cargo Bag provides ample space and full weather protection for travelers prioritizing capacity over aerodynamic efficiency. It is a practical solution for those who need to carry large loads without a fixed roof rack.

3

Yakima SkyBox NX 16 LG

Best for: Dual-sided access and secure ski storage

Lockable

Lockable (what this guide is about)

Capacity

16 cu ft

Opening

Dual-sided

Security

SKS lock

Vehicle Compatibility

StreamLine crossbars

Dimensions

75.5 x 35 x 16 in

View on Amazon: Yakima SkyBox NX 16 LG Affiliate link

The Yakima SkyBox NX 16 is a lockable roof cargo carrier with 18 cubic feet of storage. It features dual-sided access, allowing you to load gear from either side of your vehicle. The unit includes an SKS lock for security and measures 75.5 by 35 by 16 inches. Weighing 46 pounds, it offers a flattened floor for efficient packing. This model suits travelers needing secure, accessible storage for sports equipment.

Pros

• 18 cubic feet of internal capacity
• Dual-sided opening design
• SKS lock security system
• Flattened floor for unobstructed space

Cons

• 46 pounds is heavier than many competitors
• 16 inches height limits very tall items
• No mention of integrated mounting hardware

Good fit if

• You need to load gear from the passenger side
• You require a lockable roof box for security
• You transport skis or snowboards up to 175cm

Skip if

• You need more than 18 cubic feet of space
• You prefer a lighter carrier under 40 pounds
• You require a wider box for bulky items

Verdict: Yakima SkyBox NX 16 Rooftop Cargo Carrier fits buyers who prioritize secure, dual-sided access for medium-sized loads. It is ideal for those transporting skis or snowboards who value the convenience of loading from either vehicle side.

4

Eylar SRX-175 Overlanding Cargo Case

Best for: Overlanding and truck bed storage

Lockable

Lockable (what this guide is about)

Capacity

175L

Shell Type

rotomolded hard case

Water Resistance

100% Waterproof

Dimensions

47.2"L x 18.4"W x 17.9"H

Vehicle Type

Truck

View on Amazon: Eylar SRX-175 Overlanding Cargo Case Affiliate link

The Eylar SRX-175 is a 175-liter rotomolded hard case designed for truck beds or roof racks. It features a 100% waterproof seal with a heavy-duty rubber gasket and four padlock-compatible latches for security. The unit includes a hands-free gas strut lid, a built-in drain plug, and two removable interior organizer trays. Its flat top and bottom allow for secure stacking. This rugged box suits overlanding, camping, and hauling gear that requires weatherproof protection and theft deterrence.

Pros

• 175L capacity with rotomolded hard shell construction
• 100% waterproof seal with heavy-duty rubber gasket
• Four padlock-compatible latches for security
• Hands-free gas strut lid for easy loading
• Built-in drain plug and removable organizer trays

Cons

• Padlocks are sold separately
• Dimensions (47.2"L x 18.4"W) may not fit all standard roof racks
• No mention of integrated locking mechanism

Good fit if

• You need a 100% waterproof container for sensitive gear
• You want a rotomolded case that can stack securely
• You prefer a lid that stays open hands-free

Skip if

• You need a compact box for small SUV roof racks
• You require an integrated lock system without buying extras
• You are looking for a soft-sided cargo bag

Verdict: Eylar SRX-175 175L Rotomolded Case fits overlanders who need a rugged, waterproof storage solution for truck beds or wide roof racks. It is ideal for protecting gear from the elements while allowing secure stacking and easy access.

5

DNA Motoring 11 cu ft Roof Box

Best for: secure crossbar storage with side access

Lockable

Lockable (what this guide is about)

Capacity

11 cu. ft.

Shell Type

ABS

Opening

side

Load Capacity

110 lbs

Security

key and lock

View on Amazon: DNA Motoring 11 cu ft Roof Box Affiliate link

This DNA Motoring cargo box offers 11 cubic feet of storage and a 110 lb load capacity. It measures 53 inches long and 34 inches wide, fitting vehicles with crossbars only. The ABS shell is lockable with a key system. It opens from the side to 14 inches wide for bulky items. You get no-tool assembly and a textured black finish. This setup secures gear while adding roof space.

Pros

• 11 cubic feet internal storage capacity
• 110 lb maximum load limit
• Side-opening lid up to 14 inches wide
• Key and lock security system
• No-tool assembly installation

Cons

• 11 cubic feet capacity is smaller than competitors like the 20 cu ft Asinking
• Requires crossbars for mounting
• 110 lb load limit is lower than typical hard shell carriers

Good fit if

• You need a lockable box for crossbar-mounted vehicles
• You require side-opening access for bulky items
• You want a textured black ABS shell

Skip if

• You need more than 11 cubic feet of space
• Your vehicle lacks crossbars
• You prefer glossy finishes over textured black

Verdict: DNA Motoring 11 Cu Ft Lockable Roof Box provides secure, side-access storage for crossbar-equipped cars. It suits buyers prioritizing key-lock security and no-tool setup over maximum volume.

6

Relaxcabine 13 cu ft Hard Shell Roof Box

Best for: secure storage with side access

Lockable

Lockable (what this guide is about)

Capacity

13 cu ft

Shell Type

ABS and PMMA

Opening

dual-side

Load Capacity

130 lbs

Water Resistance

weather-resistant

View on Amazon: Relaxcabine 13 cu ft Hard Shell Roof Box Affiliate link

This Relaxcabine roof cargo box offers 13 cubic feet of storage in a compact 56-inch hard shell. It features dual-side opening for easy access and a built-in lock that secures the lid when fully closed. The ABS and PMMA construction provides weather resistance for family trips. It mounts to most crossbars without tools. You get a sturdy, lockable carrier that balances security with convenient loading.

Pros

• Dual-side opening for flexible access
• Built-in locking system with key removal safety
• Tool-free installation on most crossbars
• ABS and PMMA hard shell construction

Cons

• 13 cubic feet capacity is smaller than many competitors
• No mention of aerodynamic design for noise reduction
• Standard weather resistance, not fully waterproof sealed

Good fit if

• You need a lockable box for secure storage
• You want easy side access for loading gear
• You have a smaller vehicle or lower roof load limit

Skip if

• You require maximum 20 cubic feet of space
• You need a fully waterproof sealed dry box
• You prefer a universal key system for multiple boxes

Verdict: Relaxcabine 13 Cu Ft Hard Shell Roof Box suits buyers who prioritize security and side access over raw capacity. It is a practical option for smaller loads where a lockable lid is essential.

Specifications side by side

Frequently asked questions