The pneumatic tire or air-filled tire is composed of a core filled with airtight sealed pressurized air. Normally, a reinforced steel belted tread or other materials, seals this inner core and provides the contact part with the road.
The tire would remain inflated with all the weight of the vehicle resting on it, as the air pressure within the tire is greater than atmospheric air pressure. The air pressure inside the tire gives resistance against forces that try 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 ever taken a ride in an old-fashioned carriage that had wooden wheels, you know precisely how big of a difference a set of pneumatic tires could make.
Of course, there are several disadvantages to pneumatic tires. For example in highly dangerous applications or high-performance situations, these tires can suffer a puncture and this will result in a total failure. The consequence of a blowout at high speeds could result in a serious car accident. Military planners have to take into consideration tires getting blown out by explosion shrapnel or gunfire. The worst nightmare of a vehicle crew is becoming trapped within a fire zone because of all of their tires becoming flat. Airless tires evidently don't suffer from these issues and thus, can be more suitable in some applications.
The pneumatic tire may have issues as well with the variation in tire performance and air pressure. The lower pressure in a tire could increase the comfort level and the traction. This is because of the fact that tires flatten a little and more tread is touching the road. The air pressure in the tire works to maintain the "up and down" stiffness as well as maintain the lateral stiffness of the tire. Therefore, less air pressure enables the sidewalls of the tires to flex. This leads to poor handling unfortunately. In an airless tire, the stiffness in those two dimensions is independent.
There are other issues with air pressure. Consumers are notoriously undependable when it comes to maintaining proper air pressure. Tires which have improper air pressure can result in unsafe situations. It is very important to note that pneumatic tires are also prone to temperature changes, that can be responsible for changing the internal tire pressure. It is very essential to take into account the kind of environments you will be needing your equipment to function in so that you can regularly check the tires and keep the machinery as safe as possible.