1. The tread loss is close to the wear mark
(car tire)
Any brand of tire will set a wear mark at the bottom of the tread groove. Generally, the wear mark height of car tires is 1.6mm (this height is also the legal minimum groove depth of tires), and the wear mark height of truck tires is 2.4mm. Some car owners believe that as long as the tire is not broken, even if the tire pattern is nearly polished, they still continue to use such an old tire. In fact, such an old tire is very dangerous: when encountering a slippery road, the tread pattern can not completely drain the water under the tire, which can easily lead to the vehicle out of control.
2. The tire is damaged by cracks or bulges
(car tire)
In the process of daily car use, the tire may be pierced by foreign matters or accidentally hit the road teeth, which will lead to tire damage. The damage of tire includes tread crack, tread bulge, lack of tread rubber, serious sidewall wear, tire stabbed by foreign matters for many times, etc. Especially the bulge, the tire will burst at any time. As long as these damaged tires are found, the owner should go to a professional tire store as soon as possible to check the tires of his car and replace them in time.
3. Expiration of tire life
(car tire)
Even if the car owner drives politely, the road conditions are good, and the maintenance of the tires is in place, the tires will age gradually after a long time of use. The service life of the tire is usually about 5 years. Beyond this age, the tire will begin to age. The main manifestation of tire aging is surface hardening, followed by turtle cracks. The aged tire will lose its elasticity. If it is used continuously, it will lead to tread deformation and tire burst risk.