Tire Markings Decoder
Decode tire markings (e.g., 205/55 R16 91H) and DOT codes to find dimensions, load capacity, speed rating, and manufacturing date.
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Tire Markings Decoder
The tire markings decoder is a essential tool for every vehicle owner. It helps you understand the complex codes printed on your tire’s sidewall, including dimensions, load capacity, and speed ratings.
How to use the Tire Markings Decoder?
Simply enter the string found on your tire (e.g., 205/55 R16 91V) and, optionally, the DOT code (usually the last 4 digits after the “DOT” label). The tool will automatically break down these values into a readable format.
Key Markings Explained:
- Width: The width of the tire in millimeters.
- Aspect Ratio: The height of the tire profile as a percentage of the width.
- Construction: Usually “R” for Radial, the most common type for passenger cars.
- Rim Diameter: The size of the wheel rim in inches.
- Load Index: A numerical code representing the maximum weight the tire can carry.
- Speed Rating: A letter representing the maximum speed the tire is certified for.
- DOT Code: Indicates the week and year of manufacture, critical for checking tire age.
Using this tool ensures you select the correct tires for your vehicle and monitor their safety based on age.
live_help Frequently Asked Questions (FAQ)
How do I check my tire’s manufacturing date?
Look for a sequence of characters starting with “DOT” on the tire’s sidewall. The last four digits (e.g., 0623) represent the week (06) and the year (2023) of manufacture.
What do the numbers on a tire mean (e.g., 205/55 R16)?
- 205 is the width in millimeters.
- 55 is the aspect ratio (height as % of width).
- R means Radial construction.
- 16 is the rim diameter in inches.
What is the Speed Index?
It is a letter (like H, V, or W) that indicates the maximum speed the tire can safely handle. For example, H is up to 210 km/h, and V is up to 240 km/h.
What is the Load Index?
It is a numerical code (like 91 or 94) that specifies the maximum weight each tire can support. A load index of 91 means 615 kg per tire.