Know When Your Tires Need Replacing
Enter your tire date codes. Get a clear replacement plan. No account, no tracking, no fuss.
Start Your Tire CheckTire Age Worksheet
Add each tire's DOT date code. The app calculates age and replacement timing.
Quick Presets
Your Tire Status
No tires added yet.
Enter a DOT date code or pick a preset to get started.
Summary
How to Read Your Tire's Date Code
Find the DOT Marking
Look on your tire's sidewall for the letters "DOT" followed by a string of characters. The date code is always the last four digits.
Read the Code
The first two digits are the week of the year (01-52). The last two digits are the year. So "2318" means week 23 of 2018.
Check Both Sides
Some tires have the full DOT code on one side only. If you see only partial characters, check the other sidewall.
Replacement Guidelines by Vehicle Type
| Vehicle | Recommended Replacement | Maximum Age |
|---|---|---|
| Car / SUV | 6 years | 10 years |
| Truck | 6 years | 10 years |
| Motorcycle | 5 years | 7 years |
| Bicycle | 5 years | 7 years |
| Trailer | 5 years | 8 years |
Common Mistakes to Avoid
- Confusing purchase date with manufacture date. Tires can sit in a warehouse for months. Always use the DOT code, not your receipt.
- Ignoring the spare. Your spare tire ages too. Check it even if it has never been used.
- Only checking tread depth. A tire can have good tread but still be unsafe due to age. Rubber cracks and hardens over time.
- Mixing old and new tires. If you replace one tire, try to match the age of the others. Big age differences can affect handling.
- Assuming garage storage prevents aging. Heat, sunlight, and ozone still degrade rubber even in a garage.
Questions People Ask
What if my tire code only has 3 digits?
Tires made before 2000 used a 3-digit code. The first two digits are the week, the last digit is the year of the decade. A code of "238" could mean week 23 of 1998 or 1988. If your tires have 3-digit codes, they are very old and should be replaced immediately.
Do tires expire if I don't drive much?
Yes. Time matters more than mileage for tire aging. A tire that sits in a driveway for 7 years needs replacement even with low miles. Rubber compounds break down from exposure to heat, UV light, and ozone.
Can I use tires older than 10 years?
No. Every major tire manufacturer and safety organization recommends replacing tires at 10 years regardless of condition. The risk of sudden failure increases significantly.
How do I share my tire list with a mechanic?
Use the "Share Link" button to create a URL with all your tire data. Or use "Print" to get a clean page you can hand to your mechanic. The export option gives you a text file you can email.
About This Project
Tire Age Reminder exists because tire safety is easy to overlook. Most people check tread depth but forget that rubber has a shelf life. This project gives you a simple way to track every tire on your vehicle and know when it is time for a change.
Everything runs in your browser. Nothing gets sent to a server. Your tire data stays on your device unless you choose to share it. No account, no email, no tracking.
Last updated: 2026. Version 1.0.