There are two main types of tires: low-pressure tires and vacuum tires. Low-pressure tires contain inner tubes, which are mostly used in ordinary cars and motorcycles; vacuum tubes do not have inner tubes, and the outer tubes also function as inner tubes. They are mostly used in cars and light-duty vehicles. The vacuum tyre was invented by French Michelin tyre company in 1959. It is a radial tyre structure. The inner wall of the tyre is tightly adhered to the inner film so that the tyre is not easy to collect heat at high speed. The inner film has a sealed self-adhesive layer and the tyre is nailed or After the sharp object is worn out, it is not easy to release the air immediately and the car can continue to travel for a distance.