1. Tire tread pattern depth

胎面花纹的厚度一定要大于1.6毫米，如果你经常驾车行驶在摩擦力低的湿滑路面上，能保证胎面花纹厚度是上述数值的两倍。

The thickness of the tread pattern must be greater than 1.6mm. If you often drive on a wet road with low friction, you can ensure that the thickness of the tread pattern is twice the above value.

2、胎面花纹磨损指示线

2. Tread wear indicator line

混凝土搅拌车胎面花纹磨损指示线。当磨损到达一定程度 这些隐藏在胎面沟壑中的指示线就呈现出来。胎面花纹磨损指示线为扁平的橡胶条，与胎面纵向垂直镶嵌在胎面沟壑中。如果轮胎上的几乎所有指示线都清晰可见，意味着你需要尽快更换轮胎了。

Tread wear indicator line of concrete mixer. When the wear reaches a certain degree, these indicator lines hidden in the tread grooves appear. The tread pattern wear indicator line is a flat rubber strip, which is perpendicular to the longitudinal direction of the tread and embedded in the tread groove. If almost all the indicator lines on the tire are clearly visible, it means that you need to change the tire as soon as possible.

3、轮胎侧壁裂纹

3. Tire sidewall crack

轮胎存在的问题并不是全部集中在胎面上，轮胎侧壁也会出现一些毛病。通过观察查找轮胎侧壁上那些肉眼直接可见的裂痕和切口。这些细小的沟槽预示着轮胎上未来可能出现的漏气裂缝，甚引发车的轮胎的爆裂。所以在轮胎侧壁裂纹比较严重时，建议考虑更换轮胎。

The problems of the tire are not all concentrated on the tread, and some problems will appear on the tire sidewall. Look for cracks and cuts directly visible to the naked eye on the tire sidewall. These small grooves indicate possible air leakage cracks on the tire in the future, and even cause the tire of the car to burst. Therefore, when the tire sidewall cracks are serious, it is recommended to consider replacing the tire.

4、轮胎上的凸起和起泡

4. Bulges and blisters on tires

有些情况下，混凝土搅拌车轮胎的外表面会因为强度不够，导致高出正常轮胎表面的凸起和起泡。这就如同血管中出现的动脉瘤，轮胎也面临类似的状况，如果没有及时检修，胎面上强度不足的区域有可能引发突然的爆裂。

In some cases, the outer surface of concrete mixer tire will bulge and blister higher than the normal tire surface due to insufficient strength. This is like an aneurysm in a blood vessel. The tire is also facing a similar situation. If it is not repaired in time, the area with insufficient strength on the tread may cause a sudden burst.

如果发现混凝土搅拌车的轮胎满足以上条件之一，说明轮胎该换了，不管轮胎是否爆胎，也不管用了多长时间，都应该换掉需要更换的轮胎换上新的轮胎，确保驾驶平安。

If it is found that the tire of the concrete mixer meets one of the above conditions, it indicates that the tire should be replaced. No matter whether the tire is flat or not, and no matter how long it takes, the tire that needs to be replaced should be replaced with a new tire to ensure safe driving.