What is the purpose of the sponge inside a tire?
1 Answers
This layer of sponge is called "internal soundproofing foam," and its specific functions are as follows: 1. Noise reduction: It can minimize resonance noise generated by tires during driving, with the most noticeable effect being the reduction of road noise. According to current experimental tests, compared to tires without sponge, it can reduce tire noise by approximately three to four decibels, thereby improving overall comfort. 2. Temperature insulation: It can block heat transfer. The sponge helps maintain cool air unaffected by the heat from the engine compartment, preserving air conditioning efficiency—similar to how people use foam boxes to store ice and preserve seafood.