How often should tires be replaced with new ones?

[ClaytonMarie]

Automobile tire replacement time depends on various factors such as tire brand, quality, driving conditions, and driving style, generally requiring replacement between 50,000 to 80,000 kilometers. Signs indicating tire replacement is needed: Tires must be discontinued when worn to the wear limit indicator (i.e., tread pattern depth below 1.6 millimeters), or when tires show aging. For example, if there are numerous small cracks at the bottom of the tread grooves or on the tire sidewalls, the tire should be replaced promptly, regardless of whether it's new or old. Tires with tread deformation or bead damage, those damaged by running under-inflated causing sidewall compression, tires corroded by chemicals, or those with bulges should not continue to be used. Functions of automobile tires: To support the entire weight of the vehicle, bear the load of the car, and transmit forces and moments in other directions; to deliver traction and braking torque; to ensure good adhesion between the wheels and the road surface to enhance the vehicle's power, braking, and passing performance; and to work with the car's suspension to mitigate impacts during driving and dampen the resulting vibrations.