ARB Simpson III Rooftop Tent & Annex: Elevated Expedition Comfort
The ARB Simpson III Rooftop Tent & Annex is designed for off-road explorers and touring enthusiasts who demand comfort, rapid setup, and versatile shelter on every journey. This premium ARB system combines a robust rooftop tent with a full-size zip-on annex, delivering a practical, elevated sleeping and living solution that keeps you protected from the elements and maximises usable space at camp.
How the Simpson III Rooftop Tent & Annex Enhances Your Setup
The Simpson III rooftop tent mounts securely to a suitable flat roof bar system, unfolding in minutes to provide a spacious, above-ground sleeping area. The included annex attaches seamlessly, creating an additional enclosed space ideal for changing, gear storage, or as a private kitchen or shower area. This system is engineered to keep bedding inside during travel, freeing up valuable space in your vehicle and ensuring a quick, hassle-free setup and pack-down.
Where the ARB Simpson III System Excels
This tent and annex combination is ideal for:
- Remote touring and overland expeditions where ground conditions are unpredictable
- Weekend camping trips requiring fast, comfortable shelter
- Extended journeys where weather protection and privacy are essential
- 4WD owners seeking a universal fitment for most vehicles with suitable roof bars
Whether you’re setting up camp after a long day on the trail or need a reliable base for multi-day adventures, the Simpson III delivers proven convenience and comfort.
Key Benefits of the ARB Simpson III Rooftop Tent & Annex
- Quick deployment and pack-down with unique bungee cord system
- All-weather, waterproof poly-cotton ripstop canvas construction
- Integrated insect screens on windows and doors for undisturbed sleep
- High-density 63.5mm bonded chip foam mattress for superior comfort
- Retractable anodised aluminium ladder supports up to 120kg
- Annex provides extra living, storage, or privacy space
- Universal mounting for a wide range of 4WDs and touring vehicles
Construction and Materials
Engineered for harsh environments, the Simpson III features a tough poly-cotton ripstop canvas tent body with a durable polyester flysheet. The anodised aluminium frame and poles provide strength and corrosion resistance, while the high-density mattress ensures restful sleep in any conditions. The annex is crafted from matching waterproof materials, offering reliable protection and versatility at camp.
Installation and Practical Use
Designed for straightforward installation on most vehicles with a suitable flat roof bar system, the ARB Simpson III can be deployed or packed away in minutes. The unique bungee cord system keeps tent walls tidy during pack-down, while grab straps and a sturdy ladder make access safe and easy. The annex zips on securely, expanding your sheltered space without complicated setup.
Technical Specifications
| Manufacturer | ARB |
|---|---|
| Product Type | Rooftop Tent & Annex |
| Tent Dimensions (Open) | 1400mm (W) x 2400mm (L) x 1300mm (H) |
| Annex Base Dimensions | 1600mm x 1295mm |
| Closed Dimensions | 1400mm (W) x 1200mm (L) x 300mm (H) |
| Pole Type | Anodised Aluminium 2.5mm x 1.2mm |
| Overall Weight | 81kg |
Solving Real-World Camping Problems
Traditional ground tents can be slow to set up, vulnerable to weather, and take up valuable storage space. The ARB Simpson III Rooftop Tent & Annex solves these issues by elevating your sleeping quarters, protecting you from uneven terrain, mud, and wildlife, while the annex provides a flexible, weatherproof area for storage or privacy. This system is trusted by overlanders and touring professionals worldwide for its reliability and ease of use.
Frequently Asked Questions
What vehicles can the ARB Simpson III Rooftop Tent & Annex be fitted to?
The tent is designed for universal fitment on vehicles equipped with a suitable flat roof bar system capable of supporting the tent’s weight. Always check your vehicle and roof rack load ratings before installation.
How long does it take to set up and pack away the tent and annex?
The rooftop tent can be deployed or packed away in minutes, thanks to the unique bungee cord system. The annex zips on quickly, adding only a few extra minutes to setup time.
Is the mattress included, and what are its features?
Yes, the tent includes a high-density 63.5mm bonded chip foam mattress with a removable cover, designed for comfort and insulation in all weather conditions.
Can bedding remain inside the tent during travel?
All bedding can remain inside the tent when it is packed down, helping to free up storage space in your vehicle and streamline your setup at camp.
What is the annex used for?
The annex provides additional enclosed space for changing, gear storage, a kitchen setup, toilet/shower area, or extra sleeping quarters, enhancing privacy and protection at camp.
How does the tent handle extreme weather?
The poly-cotton ripstop canvas and waterproof flysheet are engineered to withstand harsh weather, while the elevated design keeps you dry and secure above ground level.
Ready to order?
Add ARB Simpson III Rooftop Tent & Annex – Expedition Annex Roof Solution to your build
Add to cart now. If fitment is unclear, send us your vehicle, setup and goal before ordering.

Hoonies Garage
Tell us what you are building
Hoonies Garage is a quieter way to get useful updates. Share the vehicle family, build direction and mods already fitted, then we can send fewer, better product drops and fitment notes.
- Save the vehicle family and build direction
- Tell us the mods already fitted
- Choose the updates that would actually help
Need help with this product?
Send us your vehicle, setup and goal before ordering. We will help confirm fitment, product choice or the next step.