Inflation - Tire Pressure; Treadwear Indicators:; Vehicle Capacity Weight:- Page 456

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:

Narrow bands, sometimes

called wear bars, that show across the tread of
a tire when only 1/16 inch (1.6 mm) of tread
remains. See

When It Is Time for New Tires on

page 461

.

UTQGS (Uniform Tire Quality Grading
Standards):

A tire 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 464

.

Vehicle Capacity Weight:

The number of

designated seating positions multiplied by 150 lbs
(68 kg) plus the rated cargo load. See

Loading

Your Vehicle on page 378

.

Vehicle Maximum Load on the Tire:

Load on an

individual tire due to curb weight, accessory
weight, occupant weight, and cargo weight.

Vehicle Placard:

A label permanently attached to

a vehicle showing the vehicle’s capacity weight
and the original equipment tire size and
recommended inflation pressure. See “Tire and
Loading Information Label” under

Loading

Your Vehicle on page 378

.

Inflation - Tire Pressure

Tires need the correct amount of air pressure to
operate effectively.

Notice:

Do not let anyone tell you that

under-inflation or over-inflation is all right. It is
not. If your tires do not have enough air
(under-inflation), you can get the following:

•

Too much flexing

•

Too much heat

•

Tire overloading

•

Premature or irregular wear

•

Poor handling

•

Reduced fuel economy

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