Is it necessary to replace two tires when changing tires?

[VanMadeline]

If it is not the case that one tire is damaged and unusable, it is best not to replace just one tire. Below is relevant information about tires: 1. Functions of tires: Mainly include dry grip, hydroplaning resistance, providing comfort, reducing driving noise, impact resistance, wet grip, load-bearing capacity, handling performance, average wear, and mileage. 2. Cross-sectional structure of tires: Generally, it can be divided into four parts: tread, shoulder, sidewall, and bead. Each part has its own function. The tread mainly contacts the ground, the shoulder and sidewall provide support, and the bead contacts the rim to provide sealing. 3. Internal composition of tires: The interior of a tire is composed of multiple layers of different materials, including tread pattern, overlay, steel belt, stress-absorbing rubber strip, carcass ply, and inner liner.