See also:

Tire age
Tires degrade over time, even when they are not being used. It is recommended that tires generally be replaced after 6 years of normal service. Heat caused by hot climates, frequent high loadi ...

Glossary of tire terminology
Terms The tire suppliers may have additional markings, notes or warnings such as standard load, radial tubeless, etc. • Tire information placard: A placard showing the OE (Original Equipment) ...

Limitations
Strong sunlight, reflections, extreme light contrasts, the use of sunglasses, or if the driver is not looking straight ahead may make the visual warning signal in the windshield difficult to see. ...