Do car tires have inner tubes?

[LaJudah]

Car tires do not have inner tubes. Instead, the inner wall of such tires is equipped with a rubber sealing layer approximately 2 to 3 millimeters thick. Beneath this sealing layer lies a self-adhesive layer made from a special mixture of uncured rubber, which, together with the airtight layer on the tire inner wall and bead, ensures excellent airtightness between the tire and the rim, effectively replacing the function of traditional inner tubes. The advantages of car tires without inner tubes include: 1. Being tubeless with superior airtightness, ensuring long-term air retention, lower operating temperatures, extended service life, simple structure, and lightweight, all of which are beneficial for high-speed driving; 2. Since the airtight layer is a membrane tightly adhered to the inner wall of the tire, heat buildup is minimized during high-speed driving. In the event of a puncture, pressure does not drop sharply, and air leakage from nail punctures is slow or sometimes even nonexistent.