How to Determine When Car Tires Need Replacement?
2 Answers
There are three main aspects to observe when determining if car tires need replacement. Below is an introduction to tire replacement: 1. Tread wear approaching the wear indicator. Generally, the wear indicator height for passenger car tires is 1.6 millimeters (this is also the legally mandated minimum tread groove depth), while for truck tires it is 2.4 millimeters. 2. Tire damage such as cracks or bulges. Tire damage includes tread cracks, tread bulges, missing tread rubber, severe sidewall wear, and multiple punctures by foreign objects. Especially with bulges, there is a risk of sudden tire failure at any time. As soon as any of these damages are noticed, owners should promptly visit a professional tire shop to inspect their vehicle's tires and replace them if necessary. 3. Tire age expiration. The typical lifespan of a tire is around 5 years. Beyond this period, tires begin to age. The primary signs of tire aging are surface hardening followed by the appearance of cracks.
I always start by checking the tire tread depth. The simplest method is to insert a coin into the tread groove—if the national emblem's portrait is fully visible, it means the depth is less than 1.6mm, and it's basically time for a replacement. I also regularly inspect the sidewalls for bulges, cracks, or cuts, as these minor issues can accumulate and potentially lead to a high-speed blowout, which poses significant risks. If the tires are over 5 years old, even if the tread looks fine, replacement should be considered because the rubber becomes hard and brittle. Every season, I thoroughly check the tire pressure and wear patterns, as identifying issues early can prevent emergency repairs, saving money and ensuring safety. Additionally, pay attention to tire balance—if you feel steering wheel vibrations while driving, it's a warning sign to address it promptly and avoid being stranded on the road. In short, keeping basic inspection tools at home is sufficient; there's no need to spend extra money at a repair shop.
