When Should Car Tires Be Replaced?

[DiZachary]

Car tires should be replaced after approximately three years of use or around 40,000 kilometers of driving. Precautions for tire replacement: Choose tires of the same specifications; replace the valve stems simultaneously; pay attention to installation direction and inflation; check tire pressure; perform a four-wheel alignment after replacement; when removing the tire, slightly loosen the fixing bolts before using a jack to partially lift the vehicle; select tires with guaranteed quality. Tire replacement process: Loosen the bolts; lift the vehicle with a jack; remove the bolts fixing the wheel (counterclockwise to loosen, clockwise to tighten); take off the tire; install the new wheel.

[RemingtonMarie]

I've been driving for many years, and the timing for tire replacement mainly depends on wear. There are wear indicator blocks in the tire treads; when the tread wears down to that level, it's time to replace them. Generally, a tread depth below 1.6mm is very dangerous. You can use a one-yuan coin to test it—if the coin's gear pattern is exposed beyond the rim, it means the tread is too thin. Tire cracks are also an important indicator, especially on the sidewalls, which signal aging. Prolonged exposure to sun and wind makes them brittle. Additionally, if a tire has a bulge, it might indicate internal damage and should be replaced immediately. I also consider mileage—typically, tires in city driving should be replaced after about 60,000 to 80,000 kilometers. Regularly checking tire pressure and rotating their positions can extend their lifespan, but safety comes first—don't hesitate to replace them. New tires help prevent blowouts. After all, when driving, life is far more important than money.

[DelCaroline]

As a homemaker, I pay special attention to tire safety because my children ride in the car. When it comes to replacing tires, it's not just about tread wear - aged tires are even more dangerous. Generally, tires over 6 years old should be considered for replacement regardless of tread depth. The production date is marked on the tire sidewall - for example, the numbers 2318 mean the tire was produced in the 23rd week of 2018. After 6 years, tires may start cracking or hardening. I manually check the tire surface every quarter to feel for deep cracks and look for abnormal wear patterns like uneven wear on one side. If the tire pressure is frequently low, causing uneven wear, that's also a red flag. Last time during maintenance, the technician said bulging tires must be replaced immediately as they can cause blowouts at high speeds. In daily driving, I avoid sudden braking and bumpy roads - these habits can extend tire life, but when problems do occur, it's not worth skimping on replacement costs.

[DelDaniella]

I drive sports cars and often engage in aggressive driving, so my tires wear out quickly and need frequent replacement. The key is grip—if the car can't brake properly or skids on wet roads, it's definitely time to change them. If the tread depth is below 2mm, don't use high-performance tires anymore as it becomes dangerous. Use a professional depth gauge or check with the common method—if the tread wear indicators are exposed, it's past the limit. Bulges or sidewall damage are absolute deal-breakers; I scrap them immediately when spotted. Driving habits also matter, like hard acceleration which increases wear, and mountainous roads with lots of curves also consume tires faster, so early maintenance is better. In high-temperature environments, tires age faster and cracks develop quickly—a quick pre-drive inspection can prevent issues. Safety is more important than the thrill of speeding.

[DelVera]

Having worked in an auto repair shop for ten years, our criteria for tire replacement are quite straightforward, a topic customers frequently inquire about. When the wear indicator bars become visible, it's time to replace the tires—this typically happens when the tread depth is less than 1.6mm, easily noticeable by touch. Additionally, checking for cracks is essential; if any crack exceeds 2mm in depth or there are multiple cracks, it's hazardous and requires replacement. Bulges are a serious issue indicating broken internal cords and must be addressed immediately. Tires older than five years age rapidly, becoming hardened from exposure to sun and wind, posing risks even with deep treads—always check the sidewall for the manufacturing date. Furthermore, underinflation or misalignment can cause uneven wear, necessitating simultaneous correction to prevent premature damage to new tires. We recommend a safety check every 5,000 kilometers—prioritize safety and don't delay.