
Any brand of tires will have a wear indicator at the bottom of the tread grooves. The height of the wear indicator for general passenger car tires is typically 1.6 millimeters. The service life of tires is usually around 5 years. Beyond this period, tires begin to age. Aging manifests as surface hardening, followed by the appearance of cracks.

As a veteran driver with over a decade of experience, I believe judging when to replace tires requires multi-angle inspection. The most common method is checking tread wear - insert a penny into the groove; if Lincoln's head is completely visible, the tread is too thin and replacement is mandatory. Secondly, examine the surface for cracks or bulges, especially on sidewalls - any cuts could cause high-speed blowouts with enormous risks. Third, severe steering wheel vibration or unusually loud tire noise while driving may indicate imbalance or uneven wear. Remember tires have lifespan too - typically 5-6 years before becoming brittle. I conduct special inspections every Lunar New Year to ensure family trip safety. Finally, watch for wear indicators (those small raised bars on tires) - if flush with tread surface, replace immediately to avoid rainy-day brake failure, which is extremely hazardous.

When it comes to tire replacement, safety comes first. I always start by inspecting the appearance, feeling the tire surface for obvious damage or deformation. Bulges or cracks are the most common warning signs—never delay if you spot these. Then I do the coin test: insert it into the tread groove; if the coin's edge is fully visible, it's a sign of excessive wear. While driving, I pay attention to the handling—if steering feels heavier or the vehicle pulls to one side, the tires might be failing and affecting control. Tire aging is also critical—tires older than six years may have internal degradation, risking accidents even if the tread looks fine. During every maintenance check, I ask the mechanic to inspect them, catching potential issues early to ensure a safe and worry-free journey to my destination.

Determining whether to replace tires isn't actually difficult. First, check the tread wear: insert a coin into the groove, if the entire head is visible, it's basically time for a change. Then look for any cracks or bulges, which is very important. Driving feel is also quite crucial - if the car feels wobbly or makes unusual noises while driving, the tires might be uneven. Pay attention to the tire's age, be cautious if they're too old. Simply put, taking a few minutes to carefully inspect can ensure safety.


