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Cadillac XT4 Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
13527548) - 2020 - CRC - 4/11/19
274 VEHICLE CARE
Compact Spare Tire Example
(1) Tire Ply Material : The type
of cord and number of plies in the
sidewall and under the tread.
(2) Temporary Use Only
: The
compact spare tire or temporary
use tire should not be driven at
speeds over 80 km/h (50 mph).
The compact spare tire is for
emergency use when a regular
road tire has lost air and
gone flat. If the vehicle has a
compact spare tire, see Compact
Spare Tire 0 304 and
If a Tire Goes Flat 0 291.
(3) Tire Identification Number
(TIN)
: The letters and numbers
following the DOT (Depar tment of
Transportation) code are the Tire
Identification Number (TIN). The
TIN shows the manufacturer and
plant code, tire size, and date the
tire was manufactured. The TIN is
molded onto both sides of the tire,
although only one side may have
the date of manufacture.
(4) Maximum Cold Inflation
Load Limit
: Maximum load that
can be carried and the maximum
pressure needed to support
that load.
(5) Tire Inflation
: The temporar y
use tire or compact spare tire
should be inflated to 420 kPa
(60 psi). For more information on
tire pressure and inflation see Tire
Pressure 0 277.
(6) Tire Size
: A combination of
letters and numbers define a tire's
width, height, aspect ratio,
construction type, and service
description. The letter “T” as the
first character in the tire size
means the tire is for temporary
use only.
(7) TPC Spec (Tire Performance
Criteria Specification)
: Original
equipment tires designed to GM's
specific tire performance criteria
have a TPC specification code
molded onto the sidewall. GM's
TPC specificatio ns meet or exceed
all federal safety guidelines.
Tire Designations
Tire Size
The example shows a typical
passenger vehicle tire size.
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