Most modern tires have built-in "wear bars" in the grooves. When the tread is flush with these bars, the tire is at the 2/32" limit. 2. Monitor the Age of Your Tires
This is the legal minimum in most regions. If your tread is this low, you must replace your tires immediately. when to buy new tires
Many experts, including Tire Rack and SimpleTire , recommend replacing tires at 4/32" , especially if you drive in wet or snowy conditions where traction drops significantly below this point. Quick DIY Tests Most modern tires have built-in "wear bars" in the grooves
For a stricter safety margin, use a quarter. If Washington's head is fully visible, your tread is below 4/32", and you should plan for a replacement soon. Monitor the Age of Your Tires This is
Tires degrade over time due to environmental exposure, regardless of how much tread is left. How to Buy Tires: A Step-by-Step Guide - US News Cars