Where is the tire batch number located?
2 Answers
On the outer side of the tire, along one sidewall, there is a set of numbers. The last four digits of this marking provide information about the production date. Below is relevant information about tire models: 1. Tire specifications; Tire specifications are commonly represented by a set of numbers, where the first number indicates the tire section width, and the latter denotes the rim diameter, measured in inches. For example, 165/70R14 represents a radial tire with a width of 165 millimeters, an aspect ratio of 70, and a rim diameter of 14 inches. 2. Classification by tire usage: Tires are categorized by usage, including truck tires, passenger car tires, and mining tires, among others. In addition to the specification dimensions marked on the sidewall, truck tires must also indicate the ply rating. However, it's important to note that the ply rating of truck tires does not refer to the actual number of layers but rather to the load-carrying capacity of tires made with high-strength material cords, which is equivalent to the number of cotton cord layers in tires made with cotton cords.
I've been in the auto repair industry for many years and often help customers locate tire batch numbers. These are usually printed on the sidewall of the tire, requiring you to crouch down for a closer look. For example, the last four digits of the DOT code indicate the year and week of production - '2312' means the tire was manufactured in the 31st week of 2023. Many people overlook this, but it's actually crucial, especially during recalls, as it helps determine if the batch is on the risk list. Additionally, severely aged tires may blow out. Once you know the production date via the batch number, it's recommended to replace tires older than five years to ensure driving safety. In my practical experience, many customers have avoided accidents because of this. It's worth developing the habit of checking - just take a quick look during car washes or maintenance.
