Wear Indicators; Tire Service Life; Worn out tires - Page 623

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Checking and Maintaining Tires

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Wear Indicators

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Wear Indicators

The groove where the wear indicator is 
located is about 1/16 inch (about 1.6 mm) 
shallower than elsewhere on the tire. If the 
tread has worn so that the indicator is 
exposed, replace the tire. 

Worn out tires 

have poor traction on wet roads.

Tire Service Life

The life of your tires is dependent on many factors, including driving habits, road 
conditions, vehicle loading, inflation pressure, maintenance history, speed, and 
environmental conditions (even when the tires are not in use).

In addition to regular inspections and inflation pressure maintenance, it is 
recommended that you have annual inspections performed once the tires reach five 
years old. All tires, including the spare, should be removed from service after 10 
years from the date of manufacture, regardless of their condition or state of wear.

Example of a Wear 
Indicator mark