Inscription on radial tire
A – Tire size
Example: P 295/30 ZR 19 100 Y
– P - The tire is designed for Passenger vehicle.
This information is not included on all tires.
– 295 - Indication of tire width in mm
– 30 - Indication of tire height to tire width ratio in percent
– ZR - code letter for radial tires for speeds above 150 mph / 240 km/h
There are currently no standards concerning tire strength at speeds above 150 mph (240 km/h).
– R - Belt type code letter for radial
– 19 - Indication of rim diameter in inches
– 100 - 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 means manufacture's identification mark.
– second two-digit code means tire size.
– third four-digit code means tire type code.
– fourth four-digit code means date of manufacture.
If, for example, the last four numbers read 0208, the tire was produced in the 2nd week of 2008.
C – Tire ply composition and material
The number of layers in the tread and sidewalls and their material composition.
D – Maximum permissible inflation pressure
The maximum permissible cold inflation pressure to which a tire can be inflated.