**Radial tires** are designed so that certain parts work independently, which improves their performance and safety. In this type of tire, the **tread** and the **sidewalls** are the parts that operate independently.

- The **tread** is the part of the tire that is in direct contact with the road. Its design includes grooves that help improve grip, flexibility, and water evacuation, which is crucial for driving safety, especially in rainy conditions.

- The **sidewalls** are the lateral parts of the tire. Although they are not in direct contact with the road, they are essential for stability and impact absorption.

The independence between the tread and the sidewalls allows each part to fulfill its specific function without interfering with the other, thus optimizing the tire's performance. This is a key feature of radial tires, differentiating them from other types of tires where the parts do not work as independently.