Cadillac 2007 DTS, Owner'S Manual

Page: 402 / 508

Sidewall: The portion of a tire between the tread
and the bead.
Speed Rating: An alphanumeric code assigned
to a tire indicating the maximum speed at
which a tire can operate.
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 411 .
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 414 .
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 327 .
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 327 .
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
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