7-20
Vehicle care and maintenance
7
Tires
N00939200478
It is important to familiarize yourself with the following terms:
● Cold tire pressure:
• The measured pressure after the vehicle has been parked
for at least three hours,
or
• The measured pressure when the vehicle is driven less
than 1 mile (1.6 km) after having been parked for three
hours.
● Maximum inflation pressure: the maximum permissible
cold tire inflation pressure for this tire.
● Recommended inflation pressure: the inflation pressure
for optimum tire performance.
● Intended outboard sidewall:
• The sidewall that contains a whitewall, bears white let-
tering or bears manufacturer, brand, and/or model name
molding that is higher or deeper than the same molding
on the other sidewall of the tire,
or
• The outward facing sidewall of an asymmetrical tire that
has a particular side that must always face outward
when mounted on a vehicle.
● Passenger car tire: a tire intended for use on passenger
cars, multipurpose passenger vehicles, and trucks, that
have a gross vehicle weight rating (GVWR) of 10,000
pounds or less.
● Light truck (LT) tire: a tire designated by its manufacturer
as primarily intended for use on lightweight trucks or mul-
tipurpose passenger vehicles.
● Tread: portion of a tire that comes into contact with the
road.
● Tread rib: a tread section running circumferentially
around a tire.
● Tread separation: pulling away of the tread from the tire
carcass.
● Carcass: the tire structure, except tread and sidewall rub-
ber which, when inflated, bears the load.
● Sidewall: portion of a tire between the tread and bead.
● Section width: the linear distance between the exteriors of
the sidewalls of an inflated tire, excluding elevations due
to labeling, decoration, or protective bands.
● Bead: the part of the tire that is made of steel wires,
wrapped or reinforced by ply cords and that is shaped to
fit the rim.
● Ply: a layer of rubber-coated parallel cords.
WARNING
!
● Driving with tires that are worn, damaged or
improperly inflated is dangerous.
These type tire conditions will adversely affect vehi-
cle performance.
These type tire conditions can also cause a tread sep-
aration or blowout which may result in an accident
causing serious injury or death.
● Tires, including spare tire, degrade over time with
age even when they are not being used. It is recom-
mended that tires over 6 years generally be replaced
even if damage is not obvious.
BK0098300US.book 20 ページ ２００８年１２月８日 月曜日 午前１１時３７分
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