![]() ![]() A pneumatic tire can function only when that airtight core is filled with air. The inside of the tire is an airtight core. ![]() Layers of rubber-coated polyester, known as “plies,” are found underneath the rubber. The outside of a pneumatic tire features thick tread-molded rubber typically reinforced by steel belting. For example, another term for a jackhammer is pneumatic drill because it uses compressed air to quickly move a heavy metal piece up and down to blast cement apart. The term pneumatic describes something that functions using pressurized air or gas, like nitrogen. Most people are already familiar with pneumatic wheels, although they just call them “tires.” Pneumatic tires are used on most passenger cars and commercial vehicles you see (and likely operate) daily.
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