TITAN’s Spare Tire Auxiliary Fuel System (STAFS) puts an additional 30 gallons of fuel at your fingertips. This innovative system (patent pending) is designed to repurpose the space commonly used to stow a vehicle’s spare tire. Its under-body location means it has no impact on the truck bed’s cargo space. In many cases where aftermarket custom wheels and tires are installed on a vehicle, the original equipment spare cannot be used. TITAN’s Spare Tire Auxiliary Fuel System provides an underbody fuel solution to trucks of any cab type (regular, extended or crew) or bed length.