Tires can look substantial from the driveway while their usable tread is becoming shallow. A closer look gives you better information than judging them from a few feet away. Make a parked tread check part of your Phoenix car-care routine, and leave yourself time to arrange an inspection before a road trip or a busy week of driving.
Look while the car is safely parked
Choose level ground away from traffic, switch the vehicle off and secure it as the owner’s manual directs. Use good light and inspect only the areas you can safely reach. This check does not require jacking up the car, removing wheels or crawling underneath it. Ask a tire professional to inspect areas you cannot see.
NHTSA recommends checking tread at least monthly, alongside tire pressure. Tread helps provide traction, particularly on wet roads. Put the date in the same maintenance note you use for your cold-tire pressure check, so one task does not get mistaken for completion of both.
Find the raised wear bars
Look inside the main tread grooves for the small raised sections that bridge the spaces between tread blocks. These are built-in wear indicators. NHTSA says tires should be replaced when tread reaches 2/32 inch, or when the surrounding tread is level with those indicators. A visible groove somewhere else on the tire does not cancel out a worn section.
A penny can provide a quick screening check: place Lincoln’s head downward into the tread, facing you. If the top of his head is visible, NHTSA says it is time to replace the tire. Do not treat a coin check as a complete assessment of the tire’s condition or a guarantee of safe driving in rain.
Use a gauge to compare measurements
A tread-depth gauge provides a numerical reading. Follow the tool’s instructions and note its units; a value in millimeters is different from one in thirty-seconds of an inch. Michelin recommends measuring at several points across the tire’s width, because wear can vary from one edge to the other.
Label your notes by wheel position—front left, front right, rear left and rear right—and identify where each measurement came from. Record the lowest reading instead of averaging away a shallow spot. If you cannot obtain a clear reading or the results vary noticeably, have a professional check them. Describe what you see without deciding that a particular wear pattern proves an alignment, suspension or inflation problem.
Check more than tread depth
Michelin’s replacement guidance explains that remaining tread is only one part of tire condition. Cuts, cracks, bulges and changes in handling deserve attention even if a depth reading looks acceptable. Visible sidewall damage calls for immediate professional inspection. Do not use a good reading elsewhere as a reason to keep driving on a visibly damaged tire; arrange assistance when needed.
Age matters too. Follow the vehicle and tire manufacturers’ inspection and replacement guidance rather than assigning every tire the same lifespan. Our tire date-code guide explains how to find the manufacturing date. Keeping that information beside your measurements makes it easier to discuss the whole picture at an inspection.
Make the next step specific
Before contacting a tire professional, gather the readings, date, mileage and photographs of anything concerning. Ask which tires need attention and what should be checked before replacement. For separate routine maintenance such as oil-and-filter service, contact Everywhere Auto Care or call 480-818-6699. We’ll contact you to confirm your visit.
