7 Best Fender Storage Solutions That Maximize Every Inch

You’ve meticulously planned every cabinet and drawer, but there’s one frontier of storage you’ve likely overlooked: the dead space around your wheels. Fender storage is the key to unlocking a surprising amount of utility from your RV, trailer, or truck camper. It’s about turning an empty void into a secure, accessible spot for the gear you need most.

Disclosure: As an Amazon Associate, this site earns from qualifying purchases. Thank you!

Unlocking Potential: Fender Storage Explained

Fender storage isn’t just about bolting a box over your tire. It’s a strategic way to reclaim exterior space for items that are dirty, dangerous, or just plain bulky. Think about it: stashing muddy leveling blocks, extra fuel, or a noisy generator outside frees up clean, quiet, and valuable real estate inside your living space. This is one of the biggest wins in small-space optimization.

Before you buy anything, consider three things: weight, access, and security. A heavy toolbox mounted on one side can affect your vehicle’s balance. A box that’s hard to open will never get used, and one without a solid lock is just an invitation for theft. You have to balance the need for capacity with the reality of your vehicle’s suspension and your daily routines.

The biggest mistake I see is people thinking fender storage is only for tools. That’s a huge missed opportunity. The best solution depends entirely on what you need to store. A simple poly box is perfect for hoses and chocks, but you’d never put a $1,000 generator in it. Start with the problem—"Where do I put my propane tank?"—and then find the product that solves it.

Buyers Products Poly Fender Well Tool Box

This is your workhorse solution. A polyethylene (poly) box is rust-proof, dent-resistant, and relatively inexpensive. It won’t win any style awards, but it will faithfully hold your grimiest gear without complaining.

I recommend these for things that don’t need Fort Knox-level security. Use it for sewer hoses, wheel chocks, power cords, and leveling blocks. The plastic construction means you can just hose it out when it gets dirty. It’s a rugged, practical choice for the messy necessities of life on the road.

The beauty of these boxes is their shape. They are often designed to tuck neatly into the otherwise useless space right behind the wheel well, keeping a low profile. Just be sure to measure your clearance carefully, accounting for tire travel and suspension compression, especially if you go off-road.

UWS Fender Well Box: Heavy-Duty Aluminum

UWS EC30001 48-Inch Driver-Side Heavy-Wall Aluminum Truck Fender Wheel Well Tool Box, RigidCore Lid

When you need to protect valuable gear, you step up to an aluminum box. UWS makes some of the most trusted boxes in the industry, and for good reason. They are significantly more rigid and secure than their poly counterparts.

This is where you store your power tools, recovery straps, and anything else you can’t afford to lose. The rigid aluminum body and integrated locking mechanisms offer real theft deterrence. While a determined thief can get into anything, this box makes it a loud, difficult, and time-consuming process. That’s often enough.

The tradeoff is cost and weight. Aluminum boxes are more expensive and, while lighter than steel, they are heavier than poly. But if you’re carrying a few hundred dollars’ worth of tools, the extra investment for a secure, weather-sealed container is a no-brainer. It pays for itself the first time someone eyes your gear and decides it’s not worth the trouble.

Extreme Max Fender Rack for Open Hauling

Extreme Max 3005.5254 BoatTector Aluminum PWC Cargo Rack/Cooler Holder - Compatible with RotoPax Fuel Can Mounts

Sometimes a box is the last thing you need. For bulky, odd-shaped items, an open fender rack offers incredible versatility. It’s essentially a sturdy, railed platform that mounts over your fender, ready to be loaded up.

This is the solution for things that don’t fit in a box. Think coolers, firewood bundles, or bulky water jugs. The open design means you’re limited only by your imagination and a good set of tie-down straps. The downside is obvious: it offers zero security and no protection from weather or road grime.

Picture this: you’re heading out for a week of boondocking. You can strap two 5-gallon water jugs and a full cooler to the fender rack. This frees up an enormous amount of interior space and keeps the cooler condensation outside your rig. It’s a strategic choice that prioritizes bulk capacity over security.

Wavian Jerry Can Holder for Fender Mounts

Wavian USA Authentic NATO Jerry Can and Spout System - Rust-Proof, EPA & CARB Compliant, Black, 20 Litre, Wavian 5 Gallon Gas Cans for Gasoline

Let’s be direct: carrying gasoline or diesel inside your vehicle is a dangerously bad idea. Fumes can build up, and a leak can be catastrophic. A dedicated, fender-mounted jerry can holder is the only safe and responsible way to transport extra fuel.

These holders are purpose-built to clamp a standard "Wavian" or NATO-style jerry can securely to the side of your vehicle or trailer. They are designed to withstand constant vibration from rough roads without failing. A quality holder will also feature a locking mechanism to prevent your expensive can (and the fuel inside) from being stolen at a rest stop. This isn’t just a bracket; it’s a critical piece of safety equipment.

Power Tank Propane Mount for Fender Use

Just like liquid fuel, propane tanks are best stored outside. A dedicated fender mount for your propane tank frees up precious locker space and is a major safety upgrade. If a valve ever leaks, the gas dissipates into the open air instead of concentrating in an enclosed compartment.

These mounts are engineered to hold a specific size of tank—most commonly 5, 10, or 11 lb "pancake" or 20 lb BBQ-style tanks. They use robust clamps and straps to lock the tank in place, preventing it from becoming a projectile in a sudden stop. Always verify that the mount you buy is rated for the exact size and weight of your propane tank.

Torklift Lock and Load Generator Cargo Tray

Tork Lift International A7901 Lock and Load Sidekick Generator Tray (torklift)

Generators are heavy, expensive, and give off fumes. The Torklift Lock and Load is a premium solution that solves all these problems at once. It’s a heavy-duty locking tray that allows you to secure your generator to your rig’s exterior.

While often mounted on a trailer tongue or rear bumper, these trays are frequently adapted for fender-side mounting on flatbeds or toy haulers. You simply place the generator in the tray, use the locking arm to clamp it down, and add a padlock. It keeps the generator secure from theft, out of your living space, and ready to use without having to lift a 100-pound beast every time. It’s a significant investment, but it provides unmatched security and convenience.

Buyers Products Step Box for Fender Access

Why have one function when you can have two? A step box is a brilliant piece of dual-purpose design. It’s a sturdy storage box, typically made of steel or aluminum, with a grippy, load-bearing lid that doubles as a step.

This is an absolute game-changer for anyone with a truck camper, flatbed, or high-clearance trailer. It gives you a solid foothold for accessing roof racks, tying down cargo, or just getting into the bed of your truck. The storage inside is perfect for things you need to grab quickly, like tie-down straps, work gloves, or a tire pressure gauge.

The key is placement. You need to mount it where it provides a natural and safe step, which might not be the most optimal spot for pure storage. It forces you to think about ergonomics and workflow. But when you find that perfect spot, it feels like you’ve added a feature your vehicle should have had from the factory.

Ultimately, mastering your fender space is about seeing potential where others see an empty wheel well. It’s not about finding one perfect box, but about building a system of solutions tailored to your specific gear and travel style. By moving the right items outside, you create more space, safety, and freedom on the inside.