Tire Labeling
The tires that came on your vehicle have a number of markings. Those you should be aware of are described below.
Here is an example of what each marking means:
- P: tire type (passenger vehicle)
- 235: tire width in millimeters
- 60: aspect ratio (tire section height as a percentage of its width)
- R: tire construction code (radial)
- 18: rim diameter in inches
- 102: load index (code indicating maximum load tire can carry)
- T: speed symbol (code indicating maximum speed rating)
- Tire Identification Number (TIN)
- Glossary of Tire Terminology
■Tire Identification Number (TIN)
■Glossary of Tire Terminology
Cold Tire Pressure – The tire air pressure when the vehicle has been parked for at least three hours or driven less than 1 mile (1.6 km).
Load Rating – The maximum load that a tire is rated to carry for a given inflation pressure.
Maximum Inflation Pressure – The maximum tire air pressure that the tire can hold.
Maximum Load Rating – The load rating for a tire at the maximum permissible inflation pressure for that tire.
Recommended Inflation Pressure – The cold tire inflation pressure recommended by the manufacturer.
Treadwear Indicators (TWI) – The projections within the principal grooves designed to give a visual indication of the degrees of wear of the tread.
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