An air-filled or pneumatic tire consists of an inner core that is filled with pressurized air and sealed airtight. Typically, a tread made with reinforced steel belting or other kind of materials, seals this inner core and provides the contact part with the road.
The tire will remain inflated with all the weight of the vehicle resting on it, because the pressure of the air within the tire is greater than atmospheric air pressure. The pressure of the air within the tire provides resistance against forces that attempt to deform the tire. When the tire hits bumps in the road, this gives the tire a slight degree of a cushioning effect. If you have experienced taking a ride in an old-fashioned carriage that had wooden wheels, you understand exactly how big of a difference a set of pneumatic tires makes.
Surely, there are some drawbacks to pneumatic tires. For instance in high-performance situations or highly dangerous applications, these tires can suffer a puncture and this will result in a total failure. The consequence of a blowout at high speeds could lead to a dangerous car crash. Military planners should consider tires getting blown out by explosion shrapnel or gunfire. The worst nightmare of a vehicle crew is becoming trapped within a fire zone due to all of their tires becoming flat. Airless tires obviously don't suffer from these issues and therefore, in certain applications, can be more suitable.
The pneumatic tire may have problems as well with the variation in tire performance and air pressure. The lower pressure inside a tire can increase the traction and the comfort level. This is due to the fact that tires flatten slightly and more tread is touching the road. The air pressure inside of the tire works to maintain the "up and down" stiffness as well as maintain the lateral stiffness of the tire. Hence, reduced air pressure allows the sidewalls of the tires to flex. Unfortunately, this leads to poor handling. In an airless tire, the stiffness in those two dimensions is independent.
There are other problems with air pressure. Consumers are notoriously unreliable when it comes to maintaining correct air pressure. Tires which have incorrect air pressure could lead to dangerous situations. It is very vital to bear in mind that pneumatic tires are prone to temperature changes too, which could be responsible for changing the internal tire pressure. It is important to take into consideration the kind of settings you would be requiring your machine to function in so that you could regularly inspect the tires and keep the machine as safe as possible.