Tire grades and plies are the specific strength signs that the tire can withstand the maximum load under actual use conditions. It does not necessarily represent the actual number of layers of the cloth layer.
In fact, in addition to the tire specification and size, the number of tire layers must also be listed on the sidewall of the truck tire. This is because it is an important indicator of tire strength and has a huge impact on tire performance.
The nominal number of plies in the rubber layer of the tire is not exactly the same as the actual number of plies. The number of layers refers to tires made of high-strength material cords, and its load performance is equivalent to that of tire plies made of cotton cords. number.
The layer of the tire represents the strength of the tire to a certain extent. This is mainly due to the fact that cotton cord was first used to make carcass cord, and the international practice since then has been to use cotton cord layer as the benchmark to indicate the number of tire layers. Different levels have different load capacity of tires. Level 1 represents the strength of 1 layer of cotton cords, and level 18 represents the strength of 18 layers of cotton cords. Tires with different layers have different corresponding air pressure standards. If they are mixed together forcibly, the inflation pressure will be inconsistent, and the deformation of the tires will also be different. It is easy to be dangerous in high-load and high-speed driving.
Although the higher the level of the tire, the higher the strength of the tire and the stronger its heavy-duty resistance, it is not suitable for all cars and vehicle needs, and excessive pursuit of levels will be counterproductive.
As an important part of a car, tires contain too much knowledge that we need to understand and learn. Different specifications often mean huge differences in tire performance.