4148-1. Specifications
Type ADOT symbol
*
Tire Identification Number (TIN)
Tire manufacturer’s identification
mark
Tire size code
Manufacturer’s optional tire type
code (3 or 4 letters)
Manufacturing week
Manufacturing year
*: The DOT symbol certifies that the tire conforms to applicable Federal Motor
Vehicle Safety Standards.
Type B
DOT symbol
*
Tire Identification Number (TIN) Tire manufacturer’s identification
mark
Manufacturer’s code
Manufacturing week
Manufacturing year
*: The DOT symbol certifies that the tire
conforms to applicable Federal Motor
Vehicle Safety Standards.
QTypical tire size information
The illustration indicates typical tire
size.
Tire use (P = Passenger car, T =
Temporary use)
Section width (millimeters)
Aspect ratio (tire height to section
width)
Tire construction code (R = Radial,
D = Diagonal)
Wheel diameter (inches)
Load index (2 digits or 3 digits)
Speed symbol (alphabet with one
letter)
Typical DOT and Tire Identifica-
tion Number (TIN)
A
B
C
D
E
F
G
A
B
Tire size
C
D
E
F
A
B
C
D
E
F
G