Should the inner tube and outer tire be the same size?

[Anastasia]

The inner tube and outer tire should be the same size. The inner tube and outer tire share the same model number, though some inner tubes are compatible with multiple outer tire models, in which case the inner tube model number will be listed with multiple compatible sizes. The inner tube is one of the main components of an automobile tire, consisting of a circular rubber tube with good elasticity and heat resistance. To prevent the inner tube from developing wrinkles when inflated, its effective size should be slightly smaller than the inner wall size of the outer tire. Additional details are as follows: 1. Inner tube: Commonly referred to as the inner liner, it is an elastic circular tube with a tire valve used to maintain tire pressure. The valve is used for inflation and to keep the air inside the tube at a certain pressure. The inner tube should have good airtightness, heat resistance, elasticity, aging resistance, and minimal permanent deformation. It is generally made of butyl rubber. 2. Outer tire: The annular shell of a pneumatic tire, its function is to bear the vehicle load, prevent the inner tube from bulging after inflation, limit the outer dimensions of the tire, and protect the inner tube from mechanical damage.