The frequency of changing car tires depends on several factors, including the type of tire, driving conditions, and tire maintenance. Here are some general guidelines:Tread Depth: Tires have tread wear indicators (raised bars) built into the grooves. When the tread depth reaches these indicators (typically 2/32 of an inch or 1.6 millimeters), it's time to replace the tires. However, for better safety and performance, many experts recommend replacing tires when the tread depth reaches around 4/32 of an inch (3.2 millimeters).Driving Conditions: If you drive in rough conditions like extreme heat, heavy rain, snow, or on rough roads, your tires may wear out faster. In such cases, regular inspections are important.Tire Age: Tires can degrade over time, even if they have sufficient tread. Experts often suggest replacing tires that are 6-10 years old, regardless of their appearance. This is because the rubber can deteriorate, affecting tire performance and safety.Maintenance: Proper tire maintenance, including regular rotation, balancing, and alignment, can extend the lifespan of your tires.Manufacturer Recommendations: Check your vehicle's owner's manual or consult the tire manufacturer for specific recommendations on tire replacement intervals.Visual Inspection: Regularly inspect your tires for signs of damage, cracks, bulges, or punctures. If you notice any of these issues, replace the affected tire(s) promptly.Ultimately, it's essential to monitor your tires' condition regularly and consider the factors mentioned above to determine when they need replacement. Safety should be the top priority, so don't hesitate to replace tires if you suspect they are worn out or damaged.