DOT Tire Identification Codes


All new tires sold in the United States must have a DOT number cured into the lower sidewall of one side of the tire. This code has a standard format which has been designated by the federal government.

 
 

Some manufacturers place an additional code with a specific serial, which identifies the specific tire model (a tire type code). This optional number is located on the sidewall opposite the DOT number.

Commercial treads also include codes, which are used to detail retread information. This code is generally found on the lower sidewall near the original DOT code.

 
 

Speed Category Chart

 

Load Index Chart

The maximum load a tire can carry at various cold inflation pressures.