Used tires: what to check before you buy

A used tire is worth buying only if the size matches the vehicle, the DOT date is readable, the tread is not at the wear bars, and the sidewalls have no bulge, exposed cord, or sidewall repair.

Updated 2026-10-27

A used tire can be fine, or it can be scrap with tread

Tread depth alone does not make a used tire safe. You are also buying the age of the rubber, any repair, and whatever the sidewall has been through. If you cannot see those things, do not buy the tire.

Match the size to the vehicle

The size, load index, and speed rating need to suit the vehicle placard or the tire you are replacing. A cheaper tire in the wrong size, or with a lower load index than the placard requires, is not a bargain. See the size guide if the numbers are unfamiliar.

A pair should be the same size. Mixing very different tread depths on one axle changes how the car grips. All-wheel-drive vehicles often need the four tires to match closely. Follow the vehicle maker if that is your car.

A common recommendation is to put the tires with more tread on the rear axle, so the rear is less likely to lose grip first. The vehicle maker’s guidance overrides that, especially on all-wheel drive.

What to look at on the tire itself

Read the DOT date code. Many makers suggest inspection from about five years after manufacture and replacement by about ten years, and some say to replace closer to six years even with tread left. That is brand guidance, not a law. A tire with an unreadable date code is a tire to skip.

Measure the tread in several grooves. Reject a tire that is at the wear bars, at about 1.6 mm, or that is worn to the bars on one shoulder only. For a winter tire, shallow tread above the wear bars can already be a poor snow tire.

Skip any tire with a bulge, exposed cord, tread separation, or a repair in the sidewall. Ask what a tread repair is. A proper repair is a patch from the inside. A plug alone, or a large patch you cannot account for, is a reason to walk away.

Look for flat spots and cupping. They are uncomfortable and they can mean the tire was locked in a skid or run out of balance for a long time.

Buying from a person or a shop

On Tire-Finder, used tires are ordinary listings. The site does not inspect them and does not grade them. Meet somewhere you can look at the sidewalls in daylight, and check the date code yourself. A shop page is a directory listing: call and confirm what is actually in stock.