How to Read Tire Model and Date?
3 Answers
Tire model and date can be found on the outer sidewall of the tire, such as 175/70R14. The first number 175 indicates the tire width is 175MM, 70 represents the aspect ratio of the tire section is 70%, meaning the section height is 70% of the width. The letter R stands for radial tire, and 14 denotes the rim diameter is 14 inches. In addition to the model, tires are also marked with the following common data: Tire cord material: Indicated by Chinese pinyin, such as M-cotton cord, R-rayon cord, N-nylon cord, G-steel cord, ZG-steel radial cord tire. Speed rating: Indicates the maximum speed at which the tire can carry a specified load under specified conditions. Letters from A to Z represent the certified speed ratings from 4.8km/h to 300km/h. Common speed ratings include: Q: 160km/h; H: 210km/h; V: 240km/h; W: 270km/h; Y: 300km/h. Rim specification: Indicates the rim specification compatible with the tire for practical use, such as "Standard Rim 5.00F".
Having driven for years, I've discovered that tire dates are cleverly hidden. Check the DOT code on the tire sidewall—it's a small alphanumeric string where the last four digits, like 1220, indicate the year and week. The first two digits (12) represent the 12th week, and the last two (20) stand for 2020. Some older tires have different code formats, but now they're standardized to four digits. The key reason is that tire rubber ages, and after 6 years, it's prone to cracking, affecting braking performance—safety first. I recommend checking every six months by crouching down with a flashlight; sometimes, you'll need to turn the steering wheel to see the inner edge fully. Replacing tires past their prime can prevent high-speed risks, saving money and ensuring peace of mind—don't skimp on this crucial check.
Car enthusiasts know that the tire date is at the end of the DOT code on the sidewall, like 2519, where the first two digits represent the week and the last two the year, meaning it was produced in the 25th week of 2019. I noticed that if the wheel is mounted backward, the code might be on the inner side, so you need to turn the steering wheel to find better lighting. Be cautious if the tire is older than five years. When modifying, pay attention to the date to avoid slippage. Regularly check by shining a phone light—it's simple and hassle-free. Some brands use abbreviations, but I only focus on the numeric part. A memory trick is to remember the digit positions to avoid confusion. Replacing old tires promptly can enhance driving pleasure.
