Car tires meet one of the following conditions need to be replaced: 1, travel 3 years or 6-8 million km; 2, the tread below the life line 1.6 mm; 3, tires were tied more than 4 tires; 5, the tread is tied to the diameter of more than 4mm tires; 6, the shoulder was tied tires.
First, the tires must be removed from the rim, the professional tire dealer after the inspection and then decide whether to repair.