Do tires need to be replaced at 40,000 kilometers?

[McHolden]

If the vehicle has traveled 40,000 kilometers but not exceeded 5 years, and the tire wear is not severe, replacement is unnecessary. Below are relevant details: 1. Wear indicators: The wear indicator height for standard passenger car tires is 1.6 millimeters (this is the legally mandated minimum tread groove depth), while for load-bearing tires it is 2.4 millimeters. 2. Determining tire service life: There is a triangular marker on the tire sidewall indicating the position of the wear indicator. Following the triangle direction, you can also locate raised horizontal bars within the tread grooves - these are the tire wear indicators. When the wear indicators become flush with the tread surface, the tires need replacement.

[OSteven]

I've been driving for over a decade and encountered many tire issues. Replacing tires at 40,000 km isn't mandatory, but you must carefully inspect wear levels. Tread depth is crucial – insert a one-yuan coin into the groove; if part of the tread pattern remains visible, it's still usable, otherwise replacement is needed. Additionally, watch for aging signs like cracks, bulges, or sidewall crazing – these aren't mileage-dependent and can occur from sun exposure or prolonged use. Many factors affect tire lifespan: driving habits matter greatly (hard braking and high-speed cornering accelerate wear), and road conditions vary significantly (city roads cause less wear than bumpy rural routes). I recommend checking at least quarterly to prevent skidding risks, especially during rain. If wear is minimal and tire condition good, stretching to 50,000-60,000 km might work – but safety comes first; don't risk major accidents over small savings. Replacing tires earlier actually brings peace of mind and ensures safer long-distance travel.

[LaLeah]

As a frugal driver, I always ponder whether to change tires when my car hits 40,000 kilometers. The key is cost-effectiveness: inspect tread wear visually and by touch—continue using if depth is sufficient; a new set can range from a few hundred to several thousand yuan cheaper or more expensive. Driving habits matter greatly—smooth acceleration and avoiding sharp turns can extend tire life; road conditions are also crucial—frequent highway driving causes even wear, while gravel roads easily damage tires. Don't overlook the production date—tires over five years old may crack from aging even with little use. From a cost perspective, saving money is fine, but check tire pressure monthly—too low increases the risk of damage. Repair costs from actual problems could be much higher. Conclusion: replacement isn't always necessary—assess actual wear within your means before deciding, neither spending blindly nor neglecting safety.

[Susie]

My experience is that tires at 40,000 km can usually still be used. The inspection process is simple: feel if the tread is smooth, visually check for cracks; maintain standard tire pressure to reduce abnormal wear. Factors affecting lifespan include climate (heat accelerates rubber aging), load (frequent cargo hauling wears tires faster), and driving style (avoid aggressive acceleration). If normal, they can last until 50,000-60,000 km; but replace immediately if bulges or shallow grooves are found to prevent high-speed blowouts. Simple maintenance like regular tire rotation promotes even wear and extends usage.