In industrial and agricultural tires and ATV tires, the speed grade is a very important content. It indicates the upper speed limit of the specified load carried by industrial and agricultural tires and ATV tires under specified conditions. For different industrial and agricultural tires and ATV tires, letters will also be marked on the tire wall to identify the speed grade of the industrial and agricultural tire and ATV tires.

  It can also be seen from the name that the speed level of industrial and agricultural tires and ATV tires is an upper limit of the speed supported by the corresponding tire. Among industrial and agricultural tires and ATV tires, there are mainly letters a to Z, ranging from 4.8 km / h to 300 km / h. generally speaking, the common speed levels of industrial and agricultural tires and ATV tires mainly include:

  50. 120 km / h; M. 130 km / h; N. 140 km / h; P. 150 km / h; Q. 160 km / h; R. 170 km / h; S. 180 km / h; T. 190 km / h; U. 200 km / h; H. 210 km / h; 5. 240 km / h; W. 270 km / h; Y. 300 km / h; Z. More than 300 km / h.