How many layers of steel tires are there in a big truck?
16 or 18 layers, depending on the specific specifications of the tires. Now 12.00R20 has 20 levels, but it's expensive
The truck tire is more commonly used bias tire and radial tire, the nylon curtain cloth embryo, the latter is a steel wire cord fabric embryo; at present, in addition to engineering or special circumstances, basically in the use of radial tire.
PR is the meaning of hierarchy, which refers to the nominal number of plies in the tire rubber layer, which is not consistent with the actual ply number. It is an important indicator of the tire strength. Levels are marked in Chinese, such as 12 levels. In English, such as "14P.R", that is, the "14 poles".