Manufactured from durable cross-link polyethylene, this creatively designed 10.2 gallon fuel caddy integrates flawlessly with your AEV Tire Carrier by utilizing empty space inside and behind the spare wheel. The strategic elevated mounting position eliminates the Fuel Caddy's vulnerability to impacts and vibrations, while simultaneously offering an ideal solution for gravity fed filling into your main fuel tank. The vented OE-quality cap eliminates pressure changes due to elevation while allowing for quick and easy fill-ups. Built in step gives extra-handy access to roof rack. Works with tires up to 37 inches in size.