Reading the inscription on radial tires
Fig. 235: Inscription on radial tires
A Tire size
B TIN (Tire Identification Number)
CTire ply composition and material
DMaximum permissible inflation pressure
E Maximug load rating
GTerm of tubeless or tube tire
A - Tire size
Example: P 265/40R18 (101Y)
- P - The tire is designed for Passenger vehicle.
This information is not included on all tires.
- 265 - Indication of tire width in mm
- 40 - Indication of tire height to tire width ratio in percent
- R - Belt type code letter for radial
- 18 - Indication of rim diameter in inches
- 101 - Load capacity coefficient
- Y - Speed code letter
- XL (Extra Load) - Tire with increased load rating
B - TIN (Tire Identification Number)
Example: DOT xx xx xxxx xxxx
- The DOT symbol indicates that the tires comply with the requirements of the US Department of Transportation and provides information about:
- first two-digit code indicates the manufacturer’s identification mark.
- second two-digit code indicates the tire size.
- third four-digit code indicates the tire type code.
- fourth four-digit code indicates the date of manufacture. If, for example, the last four numbers read 0204, the tire was produced in the 2nd week of 2004.
C - Tire ply composition and material
The number of layers in the tread and sidewalls and their material composition.