How to tell the model of car tires

How to tell the model of car tires

When it comes to car maintenance and tire replacement, it's crucial to know what your tire model means. The tire model not only determines the size and performance of the tire, but also directly affects driving safety and driving experience. This article will analyze each part of the tire model in detail and help you quickly master relevant knowledge through structured data.

1. Basic structure of tire models

Tire model numbers usually consist of a series of letters and numbers, such as "225/55 R17 97H." These characters represent the tire's width, aspect ratio, construction type, wheel diameter, load index and speed rating. The following is a detailed analysis:

2. Detailed analysis of tire models

1. Tire width (such as 225)

Tire width refers to the width of the tire in contact with the ground, measured in millimeters. The larger the value, the larger the contact area between the tire and the ground and the stronger the grip, but fuel consumption may also increase accordingly.

2. Flatness ratio (such as 55)

Aspect ratio is the ratio of tire sidewall height to width. For example, 55 means the sidewall height is 55% of the width. The lower the aspect ratio, the better the tire handles, but the comfort may be reduced.

3. Structure type (such as R)

"R" stands for radial tire, which is the most common tire construction today. Other types include "D" (bias ply) and "B" (belted), but are less common.

4. Hub diameter (eg 17)

Wheel diameter refers to the size of the wheel that the tire fits, measured in inches. When choosing tires, you must ensure that the wheel diameter is consistent with the original vehicle specifications.

5. Load index (eg 97)

The load index indicates the maximum weight a tire can carry. The following are the weights corresponding to common load indexes:

6. Speed level (such as H)

The speed rating indicates the maximum safe driving speed of the tire. The following is a comparison table of common speed grades:

3. How to choose the tire model according to the car model

When selecting tires, refer to the vehicle owner's manual or the original tire sidewall model information. Here are some examples of tire models for common car models:

4. Other identification of tire models

In addition to the base model number, the following information may be marked on the tire:

• Production date: For example, "3523" means production in the 35th week of 2023.
• Wear limit mark: Bumps within the tread grooves indicate wear limits.
• 3T index: Treadwear (wear resistance index), Traction (grip), Temperature (high temperature resistance).

5. Summary

Knowing how to interpret tire models can help you choose tires more scientifically to ensure driving safety and performance. When replacing tires, be sure to choose a model that is consistent with the original manufacturer's specifications, and adjust the aspect ratio or speed rating according to driving habits and road conditions. Regularly check tire wear and air pressure to extend tire life.