Choosing the Right Under Tray Tool Box – Maximising Your Ute Storage

A cluttered ute tray makes tools harder to find and leaves less room for larger loads. An under-tray tool box turns unused space beneath the tray into practical storage without reducing the main cargo area.

However, choosing the right one depends on what you carry, available space, material, weight, access and how you use your ute. The biggest box is not always the best box. The right setup should maximise storage while maintaining accessibility, vehicle clearance and everyday practicality.

This guide explains how to compare storage needs, materials, strength, security, weather protection, fitment and custom options to find the right storage solution for your ute.

Key Takeaways: What to Look for When Choosing an Under Tray Tool Box

Short on time? Here is the entire decision in one place.

• Storage requirements: Size the box to what you actually carry, not what looks impressive in a listing.
• Available space: Check wheel position, suspension movement, ground clearance and other components before you measure the box.
• Material: Steel for heavy-duty strength and security; aluminium under-tray toolbox for lighter weight and corrosion resistance.
• Weight and capacity: Factor in the combined weight of the box and everything you plan to store inside it.
• Accessibility: Doors should open freely, and your most-used tools should be the easiest to reach.
• Security and weather protection: Look for robust construction, reliable locks and proper weather sealing.
• Standard or custom: A standard box suits straightforward setups. Custom toolbox makes sense when your ute or workflow does not fit the mould.
• Professional fitment: Correct mounting protects clearance, safety and long-term performance.
  
  

Now let us look at each of these in detail, starting with what you actually need to store.

What Is an Under Tray Tool Box and Why Should You Install One?

An under-tray tool box is a lockable storage compartment mounted beneath a ute or light-truck tray, designed to use space that would otherwise sit wasted without reducing the tray’s main cargo area.

Installing an under tray toolbox gives you maximised storage without shrinking the main Ute tray, quick access to gear you use daily, better organisation, and protection from weather and opportunistic theft.

Builders, plumbers, electricians, construction crews, mobile technicians, and 4WD or touring owners all rely on this style of storage to free up the tray.

Start by Considering What You Need to Store

Before you look at box size, work out what you are actually storing. Hand tools, power tools, straps and tie-down gear, recovery equipment, PPE and smaller accessories all take up different amounts of space, and some need far more frequent access than others.

Ask These Questions Before Choosing a Toolbox

• What equipment will you carry day to day?
• How much storage capacity do you genuinely need?
• Which tools need frequent access versus occasional use?
• Will your storage needs grow over time?
• Do you regularly carry particularly heavy gear?

The best under tray tool box is not necessarily the largest one available. It is the box that holds what you need without adding unnecessary weight or eating into ground clearance.

Check How Much Usable Space Is Available Under Your Tray

Toolbox selection depends on usable space, not tray dimensions alone. Wheel position, ground clearance, suspension movement, the spare tyre, fuel tank and exhaust all reduce what is actually available underneath.

A box that technically fits the tray length can still be the wrong choice once these factors are accounted for. Incorrect measurement is one of the most common mistakes buyers make, and we cover the finer detail of measuring correctly in our guide to [common under tray tool box mistakes].

Steel vs Aluminium Under Tray Tool Box: Which Material Should You Choose?

Steel under tray tool boxes prioritise strength, security and heavy-duty performance, while aluminium boxes offer lighter weight and natural corrosion resistance. The right choice depends on your workload, the weight of your equipment, your driving conditions and your vehicle setup.

When Is a Steel Under Tray Tool Box the Better Choice?

Steel under tray toolbox earns its place on utes carrying heavy tools day in, day out. If you work demanding worksites, drive rough WA roads regularly, or simply want strength, security and long-term durability over shaving off a few kilograms, steel is the more capable option. This is why GTE Perth builds its toolboxes from heavy-duty steel as standard.

When Would Aluminium Be More Suitable?

Aluminium under tray toolbox is worth considering if weight is your main concern, your payload is already tight, or you are running a lighter-duty setup rather than a daily work vehicle. It resists corrosion naturally and shaves weight off your build, which suits touring rigs and payload-sensitive utes well.

Balance Toolbox Strength, Storage Capacity and Vehicle Weight

Toolbox weight, the weight of what you store inside it, and your available payload are all connected. A bigger box invites more gear, so think about the combined weight of box and contents, not just the box’s dimensions.

Tradespeople carrying heavy equipment daily generally prioritise structural strength over shaving weight. Touring or payload-sensitive setups often weigh this differently, and that is a reasonable trade-off if made deliberately.

Consider How Easily You Can Access Your Tools

Storage that fits is only half the equation. Toolbox positioning, door opening direction, side access, and clearance around doors all affect how the box functions on an actual working day.

Picture your normal routine and identify which tools you reach for most. A box with plenty of capacity but poorly planned access will frustrate you daily, even if it looked perfect on paper.

Look for Security and Weather Protection That Suits WA Conditions

The right level of protection depends on the value of your equipment, where you park, how often you use the box, and your work environment. At minimum, look for strong locks, quality hinges and robust construction.

Weather sealing matters more in WA than in milder climates. Constant UV exposure, dust on unsealed roads, and the odd downpour all take a toll on lower-quality boxes over time, so rubber door seals and durable finishes are essential, not optional extras.

Reputable manufacturers also design under tray toolboxes to sit within standard vehicle compliance requirements, which matters if your ute is used commercially or needs to pass regular fleet inspections.

How Do Under Tray Toolboxes Compare with Other Ute Storage Options?

• Under tray toolbox vs tray-mounted toolboxes: these eat into tray space and sit higher, raising the vehicle’s centre of gravity. Under tray boxes leave the tray clear.
• Under tray toolbox vs canopies: canopies add height, weight and cost for enclosed storage. Under tray boxes add storage without changing your vehicle’s profile.
• Under tray toolbox vs drawer systems: drawers suit organisation but use tray space. Under tray boxes work alongside a drawer system rather than competing with it.

Standard or Custom Under Tray Tool Box: Which Is Right for Your Ute?

Choose a Standard Toolbox When

Your tray setup is conventional, your storage needs are simple, standard dimensions fit without issue, and there are no unusual obstructions underneath.

Consider a Custom Under Tray Tool Box When

A standard box would waste usable space; your vehicle has unique clearance requirements; you need to fit specific tools; or the box needs to integrate with other tray upgrades already fitted.

The goal is to design storage around your vehicle and how you work, rather than adapting your habits to fit a box that is not quite right.

Under Tray Toolbox Installation – Why It Matters as Much as the Toolbox You Choose

Even a well-built toolbox needs correct installation to perform properly. That means mounting without compromising chassis integrity, keeping ground clearance intact, and loading it responsibly regardless of material.

Professionally installed toolboxes integrate cleanly with your Ute’s existing tray. This avoids the fitment issues covered in more detail in our guide to common under tray tool box mistakes.

Choose an Under Tray Tool Box Built Around How You Use Your Ute

The right under tray tool box comes down to what you carry, the space you have, the strength and weight balance your ute can handle, how easily you need to access your gear, and the security and weather protection your work demands.

GTE Perth has designed and built heavy-duty steel trays, toolboxes and canopies in Perth for over 30 years, fitted to all makes and models by our own team.

FAQs

What size under tray tool box do I need?

The right size depends on the equipment you carry, the usable space beneath your tray once clearance is accounted for, and your vehicle’s configuration. Measure first, then match the box to your storage needs.

Are steel or aluminium under tray tool boxes better?

Steel offers superior strength and security for heavy-duty daily use, while aluminium is lighter and naturally corrosion resistant. Steel generally suits tradespeople on demanding worksites, while aluminium suits weight-conscious or touring setups.

Can an under tray tool box fit any ute?

Fitment depends on your tray, wheel position, suspension, spare tyre, exhaust and other fitted components, so not every box suits every model. A custom-built box removes this guesswork.

Is a custom under tray tool box worth it?

A custom box is worth considering when standard sizing wastes usable space, your vehicle has unique clearance requirements, or the box needs to integrate with tray upgrades already fitted.

How long do under tray toolboxes last?

A well-built steel or aluminium toolbox that is properly sealed, maintained and not overloaded can last a lifetime; many years of daily work use, particularly when correctly fitted from the start.

Want a toolbox that actually fits how you work, not just how you park?

Upgrade Your Ute Storage with GTE Perth

We manufacture heavy-duty toolboxes for all makes and models, giving Perth tradies and ute owners secure, practical storage built around demanding work requirements.

Our experts can help you choose between steel and aluminium, standard and custom, based on what you carry and where you drive, then fit it properly the first time.

Get a Quote Now