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10-48
Vehicle Care
Traction
The friction between
:
the tire and the road surface.
The amount of grip provided.
Tread
The portion of a tire that
:
comes into contact with
the road.
Treadwear Indicators
bands, sometimes called wear
bars, that show across the tread
of a tire when only 1.6 mm
(1/16 in) of tread remains. See
When It Is Time for New Tires
on page 10-56.
UTQGS (Uniform Tire Quality
Grading Standards)
information system that provides
consumers with ratings for a
tire's traction, temperature, and
treadwear. Ratings are
determined by tire
manufacturers using
government testing procedures.
The ratings are molded into the
sidewall of the tire. See Uniform
Tire Quality Grading on
page 10-59.
Vehicle Capacity Weight
number of designated seating
positions multiplied by
68 kg (150 lb) plus the rated
Narrow
:
cargo load. See Vehicle Load
Limits on page 9-15.
Vehicle Maximum Load on the
Tire
:
due to curb weight, accessory
weight, occupant weight, and
cargo weight.
A tire
Vehicle Placard
:
permanently attached to a
vehicle showing the vehicle
capacity weight and the original
equipment tire size and
recommended inflation pressure.
See Tire and Loading
Information Label under Vehicle
Load Limits on page 9-15.
:
Load on an individual tire
A label
:
Tire Pressure
Tires need the correct amount of
air pressure to operate
The
effectively.
Neither tire underinflation nor
overinflation is good.
Underinflated tires, or tires
that do not have enough air,
can result in:
Tire overloading and
overheating which could
lead to a blowout.
Premature or
irregular wear.
Poor handling.
Reduced fuel economy.
Caution
(Continued)
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