The triangular mark on the side of the tire: 1. The place where the "△" symbol is printed on the tire tells you that there is a wear mark. If the tire wears out the tread, it means that the life is almost up and it is time to replace the tire; 2 , Judging from the age of the tire, there will be four digits on the sidewall of the tire indicating the manufacturing date of the tire. The first two digits represent the week number and the last two digits represent the year. The tires should generally not be used for more than 3 years and the mileage should not exceed 60,000 kilometers. Although slightly exceeding the age and mileage will not affect the overall situation, the low temperature in winter and the rain in summer will make the tire's wet grip and dry handling relatively poor; 3. Pay attention to the sidewall of the car tire: As the tire rubber gradually ages, the tire sidewall Deep lines will appear on the wall. However, as long as the tire sidewall is not hit and the cord is not broken, it can continue to be used. The triangular mark on the sidewall of the tire can help car owners find a protrusion in the groove of the tire crown to determine the actual wear limit of the tire, which value should be greater than 1.6 mm.