Buying Used Tires? Check These Things First

Step 1: Check the DOT Date Code

Tire age matters for safety - not just tread depth. Tire rubber degrades with age regardless of use. Most tire manufacturers and the NHTSA recommend replacing tires older than 6 years, regardless of tread depth. At 10 years, tires should be replaced unconditionally.

The DOT code on the sidewall includes the manufacturing date. The last 4 digits indicate manufacturing week and year (e.g., 3422 = week 34 of 2022). Any used tire with a DOT date older than 6 years should be approached with extreme caution.

• Find DOT code on sidewall - format ends in 4-digit week/year code
• Tires older than 6 years: evaluate carefully, consult a professional
• Tires older than 10 years: replace regardless of tread depth or visual condition
• Be especially cautious with spare tires - they may be much older than the main tires

Step 2: Run a NHTSA Recall Check

Before purchasing or installing any used tires, check the DOT code against NHTSA's recall database at nhtsa.gov/recalls. Search by brand and model, or use the tire recall lookup tool if NHTSA provides one for the specific DOT code.

Recalled tires should not be installed. Many used tire sellers - particularly informal sources like Craigslist or Facebook Marketplace - are unaware of or do not disclose recalls. Verifying yourself is essential.

• Check nhtsa.gov/recalls before purchase - not after installation
• Search by brand and model, and by DOT code if possible
• Do not install recalled tires - NHTSA recall remedies may still be available even for secondhand tires

Step 3: Visual Inspection and Tread Depth

Beyond age and recalls, used tires require physical inspection. Sidewall cracking (ozone cracking), bulges, patches, plugs, and uneven wear patterns can indicate compromised structural integrity.

Use a tread depth gauge - tires below 2/32 inch are legally bald in most states; tires below 4/32 inch have meaningfully reduced wet-weather performance. A quarter placed in a tread groove: if you can see the top of Washington's head, you're at about 4/32 inch.

• Check for sidewall cracking - indicates rubber degradation from age and UV exposure
• Inspect for bulges - indicate internal damage, immediate replacement required
• Check for previous repairs - plugs and patches are acceptable in limited circumstances but reduce resale and warranty value
• Measure tread depth: minimum safe = 4/32 inch; legally bald = 2/32 inch

Register Used Tires for Recall Protection

Even used tires can be recalled - especially for defects discovered after years in the field. Registering the DOT numbers with the tire manufacturer (or with Bawte) ensures you receive recall notifications if a safety issue is discovered for that manufacturing batch.

No warranty coverage is available for used tires, but recall monitoring remains valuable as long as you drive on them.