Tire Replacement Diagnostic
Enter the sidewall DOT code, tread depth, and odometer to see the manufacture date, tire age, wear status, and replacement urgency as a traffic light.
🛞 Tire Information
Last 4 digits after 'DOT' on the sidewall. First 2 = week, last 2 = year (2424 = week 24 of 2024).
📍 DOT location: after the 'DOT' letters on the tire sidewall — the 4-digit code may only be stamped on one side.
Measure with a tread gauge. New tires are ~7–8mm; the legal limit is 1.6mm.
🪙 No tread gauge? Use the coin test
Diagnostic Criteria Sources
- 🔢 DOT date code: US NHTSA Tire Identification Number (TIN)
- 📏 1.6mm wear limit: Korea Road Traffic Act tire safety standard
- 📅 7-year age: Hankook, Michelin and other maker recommendations
- 🌧️ Seasonal thresholds (wet 3.0mm / winter 4.0mm): maker general guidance
※ This diagnostic is a reference estimate. Uneven wear, cracks, and cord damage require visual and professional inspection.
📋 Replacement Diagnostic Result
Replacement urgency
🟢 Good
Currently in good condition
•Age, tread, and mileage are all within the good range.
•Enter the DOT code to also assess age since manufacture.
Manufactured
-
Tire age
-
Age
🟢
-
Tread
🟢
5.0mm
Mileage
🟢
30,000 km
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