Expedition Vehicle Builds

Let Atkinson Vos take the worry out of building your Expedition Vehicle

For over four decades we’ve supported the Unimog expedition market — supplying base vehicles, developing reliable accessories, and carrying out essential servicing and repairs in our fully equipped workshop. In recent years, we’ve expanded our capabilities to include purpose-built subframes and high-quality composite habitation boxes, giving you a complete, well engineered foundation for your build.

Everything we produce is designed with the same philosophy as the Unimogs we work with: robust, practical, and proven through real-world experience.

Your expedition vehicle starts here — engineered for adventure and built to go anywhere.

Using the original Mercedes mounting points, we employ a 4-point torsion-free system that eliminates excessive stress on the habitation box, preventing damage from chassis articulation and ensuring a longer lifespan. This allows the chassis to flex as Mercedes intended while keeping your living space secure. The design also enables the integration of a pass through, providing easy access between the cab and habitation box.

Our subframes are built to fully support our composite habitation boxes without the need for any internal metal framework. Additionally, the lightweight design lowers the vehicle’s centre of gravity, improving on-road handling and reducing body roll in extreme off-road conditions.

For those seeking the ultimate in durability, we also offer a premium stainless steel subframe option. Designed to withstand the harshest environments, it offers unparalleled resistance to corrosion, ensuring your vehicle remains expedition-ready for years to come.

Our expertly designed and fabricated subframes offer complete peace of mind—wherever the road takes you.

Our high-strength composite GRP and XPS foam panels are completely free from metal framing, eliminating cold bridges and maximizing insulation. This keeps the interior warm in winter, cool in summer, and free from condensation buildup—crucial for long-term off-grid travel.

Unlike standard composite panels, our design has been specifically optimised for expedition vehicles, ensuring unmatched durability in extreme conditions. The woven GRP inner and outer skins provide superior impact resistance, protecting your vehicle from the inevitable knocks and scrapes of overland travel. Meanwhile, our staggered dual-layer XPS foam core eliminates weak and cold points, offering exceptional structural integrity and thermal efficiency.

Our walls are 64mm thick, with an 84mm reinforced floor, striking the perfect balance between insulation, strength, and weight.

With our habitation boxes, you get the best of all worlds: lightweight strength, exceptional insulation, and the rugged durability needed for serious adventure.

The connection to the subframe is achieved using innovative GRP bolts with recessed spreader plates, minimizing intrusion into your living space. These bolts conduct heat 100 times less than steel, ensuring a completely cold-bridge-free structure—something metal-framed alternatives simply can’t offer whilst providing a strong connection.

The most common requests from new Unimog owners are to enhance cruising ability and to improve comfort in the cab.

 Larger tyres, faster crownwheel & pinion, faster hub gears and gearbox upgrades all provide worthwhile increases in overall transmission ratio. The optimum solution depends on the base vehicle.

We can provide a full suite of measures to improve cab refinement including air-suspension seats, sound deadening, engine blankets and if all else fails a stereo and speakers!

Long range diesel tanks are also a popular option to increase range whilst our amazing LED headlight kit lights up the road for safety in all conditions.

Whether you're tackling remote terrain, optimizing storage, or adding crucial off-road capabilities, we’ve got you covered with our range of optional extras designed specifically for our Unimog suframes and boxes but we can also offer custom accessories for any expedition truck.

• Pass Through – Move easily between the cab and habitation box for ultimate convenience.
• Heavy-Duty Toolboxes – Secure your gear in rugged, weatherproof storage without sacrificing valuable living space.
• Bike & Spare Wheel Carrier – Carry a motorbike for convenience and stow your spare wheels with ease.
• Front-Mounted Spare Wheel Carrier – Great value solution to keep your spare wheel accessible and improve weight distribution.
• Long-Range Fuel Tanks – Go further with confidence by increasing your fuel capacity.
• Access Steps – Choose from a range of sturdy access solutions to suit your needs and budget.
• Brush Bars – Protect your habitation box and roof-mounted solar from impact damage.
• Expedition Roof Rack – Expand your storage with a durable, functional platform.
• Winches – Be self-reliant with our high-powered recovery solutions, ready for any challenge.
• Integrated Winch Bumper – Boost your Unimog’s looks and functionality with a full steel bumper, integrated bash guard, LED lighting, and an 8-tonne winch.
• Off-Road Tyres & Beadlock Wheels – Gain superior traction with lightweight aluminum beadlocks, built for extreme terrain.