There is a stamped "△" sign on the tire shoulder along the five equal parts of the circle, which is the early warning signal sign of tire wear. When the tire tread is worn to the bottom of the groove 1.6mm, this part of the groove begins to break, resulting in obvious cracks. So as to remind the driver that the tire must be changed. Tire wear indicator is not only the guarantee of safe driving of tires, but also the basis for checking whether tires are worn normally. When abnormal tire wear occurs, it can be clearly displayed on the tire wear indicator.