Why is there sponge inside the tire?

[EthanAnn]

It is a normal phenomenon. The sponge inside the tire is called "internal soundproofing foam". Noise isolation: It works by blocking external sounds, such as noise from passing vehicles nearby. It minimizes sound reflection and reduces noise transmission to the ears by converting sound energy into heat through friction with the air in the material when sound waves enter. Its main function is to absorb and reduce noise generated by internal vibrations. Temperature isolation: It can block heat transfer. The sponge helps maintain the cool air from being affected by the heat in the engine compartment, ensuring the effectiveness of the air conditioning system.