Cracking on the sidewalls, known as "weather checking," indicates that the protective oils in the rubber have evaporated. This code, typically presented as a sequence of four digits stamped on the sidewall, reveals the exact week and year a tire was manufactured.
Check Date On Tires Inspect Tire
This degradation reduces the tire's ability to manage heat, handle road imperfections, and maintain a proper seal on the wheel. Interpreting Date Codes for Long-Term Storage While the check date provides the factual age, observing the physical condition of the rubber offers additional context regarding its care.
The subsequent two digits indicate the year the tire was made, showing the last two digits of the manufacturing year. If the numbers are preceded by letters, you have not yet located the complete code and should inspect the other side of the tire or move along the circumference to find the full identifier.
Check Date On Tires Inspect Tire Sidewall Code and Wear
These time limits are established based on extensive material science testing and real-world failure data, emphasizing that time is a more critical factor than mileage when it comes to tire integrity. Decoding the DOT Code Structure The first two digits of the Department of Transportation (DOT) code represent the specific week of production, ranging from 01 to 52.
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