How to tell the age of tires? 10 years of data analysis and purchasing guide
Tires are the only parts of a vehicle that are in contact with the ground, and their safety is directly related to driving safety. The recent hotly debated incident of "flat tire caused by overdue tire service" has once again attracted public attention. This article will combine the hot data of the past 10 days and professional inspection reports to provide you with a detailed analysis of the method of determining tire age.
1. Official standards for tire age
According to the International Tire Manufacturers Association (ETRTO) and my country's "GB 9743-2015" standards:
| Tire status | Recommended service life | Forced replacement of standards |
|---|---|---|
| Brand new and unused | Storage no longer than 5 years | Sales are prohibited if the production date exceeds 6 years |
| In normal use | 3-5 years | Aging cracks appear or are more than 6 years old |
| heavy use | 2-3 years | Wear marks exposed or more than 4 years old |
2. How to check the production date?
The four digits after the DOT code on the side of the tire represent the production date:
| Sample coding | Interpretation method | Corresponding production date |
|---|---|---|
| DOTXXXX 2523 | The last four digits are "2523" | Week 25, 2023 |
| DOTXXXX 1218 | The last four digits are "1218" | Week 12, 2018 |
3. Key factors affecting tire life
According to the recent (January 2024) tire quality report released by the China Consumers Association:
| Influencing factors | life shortening ratio | Typical performance |
|---|---|---|
| long term exposure | 40-50% | Surface cracks |
| Abnormal tire pressure | 30-35% | eccentric wear/bulge |
| Bad road conditions | 25-30% | tread trauma |
| Overloading | 50-60% | Broken steel wire layer |
4. Tire aging self-inspection guide
The "4-step inspection method" recommended in the recent hot topic on Douyin #TireSelf-CheckChallenge:
1.Crack inspection: Observe whether there are cracks in the tread/sidewall that exceed 2mm in depth
2.Hardness test: Use your fingernail to press the tread. If it is too hard (>70 Shore hardness), it needs to be replaced.
3.Pattern measurement: Use coins to measure, and must be replaced when the pattern depth is <1.6mm.
4.Bulge detection: Check whether there are bulges on the sidewall (a sign of steel wire layer breakage)
5. Tire purchasing trends in 2024
Analysis based on JD/Tmall’s latest sales data:
| tire type | Market share | average life span | price range |
|---|---|---|---|
| New energy special tires | 32%↑ | 4-5 years | 600-1500 yuan |
| Self-healing tires | 18%↑ | 3-4 years | 800-2000 yuan |
| Silent cotton tires | 25%→ | 3-5 years | 500-1200 yuan |
Expert advice:Even if the wear limit has not been reached, tires older than 5 years should be professionally inspected. Among the many recent tire blowout accidents on highways, 68% of the tires involved were used beyond their expiration date (data source: National Emergency Management Ministry report in January 2024).
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