Airless tires are a type of tire that does not rely on air pressure for support. Instead, they use a solid material, such as foam or plastic, to provide a cushioned ride. Airless tires have several advantages over traditional tires. For one, they can never go flat, which means you'll never have to worry about getting a flat tire while on the road. Additionally, airless tires tend to be more durable and require less maintenance than traditional tires. However, they are often more expensive than traditional tires and may not provide as smooth of a ride.