2007 CHEVROLET CORVETTE tires
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Tires
Your new vehicle comes with high-quality tires
made by a leading tire manufacturer. If you ever
have questions about your tire warranty and where
to obtain service, see your GM Warranty booklet for
details. For additional information refer to the tire
manufacturer’s booklet included with your vehicle.
{CAUTION:
Poorly maintained and improperly
used tires are dangerous.
Overloading your tires can cause
overheating as a result of too much
friction. You could have an air-out
and a serious accident. SeeLoading
Your Vehicle on page 309.
CAUTION: (Continued)
CAUTION: (Continued)
Underin ated tires pose the same
danger as overloaded tires. The
resulting accident could cause serious
injury. Check all tires frequently to
maintain the recommended pressure.
Tire pressure should be checked when
your tires are cold. SeeInflation - Tire
Pressure on page 386.
Overin ated tires are more likely to
be cut, punctured, or broken by a
sudden impact — such as when
you hit a pothole. Keep tires at the
recommended pressure.
Worn, old tires can cause accidents.
If your tread is badly worn, or if
your tires have been damaged,
replace them.
SeeHigh-Speed Operation on page 388
for in ation pressure adjustment for
high speed driving.
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Low-Pro le Performance Tire
The original equipment tires on your vehicle are
classi ed as low-pro le performance tires. These
tires are designed for very responsive driving on
wet or dry pavement. You may also notice more
road noise with low-pro le tires and that they
tend to wear faster.
Notice:If your vehicle has low-pro le tires,
they are more susceptible to damage from
road hazards or curb impact than standard
pro le tires. Tire and/or wheel assembly
damage can occur when coming into contact
with road hazards like, potholes, or sharp
edged objects, or when sliding into a curb.
Your GM warranty does not cover this type
of damage. Keep tires set to the correct
in ation pressure and, when possible avoid
contact with curbs, potholes, and other
road hazards.
Winter Tires
If you expect to drive on snow or ice covered
roads often, you may want to get winter tires
for your vehicle. All season tires provide good
overall performance on most surfaces butthey may not offer the traction you would like
or the same level of performance as winter tires
on snow or ice covered roads.
Winter tires, in general, are designed for increased
traction on snow and ice covered roads. With winter
tires, there may be decreased dry road traction,
increased road noise, and shorter tread life. After
switching to winter tires, be alert for changes in
vehicle handling and braking.
See your dealer for details regarding winter tire
availability and proper tire selection. Also, see
Buying New Tires on page 394.
If you choose to use winter tires:
Use tires of the same brand and tread type
on all four wheel positions.
Use only radial ply tires of the same size,
load range, and speed rating as the original
equipment tires.
Winter tires with the same speed rating as your
original equipment tires may not be available for H,
V, W, Y, and ZR speed rated tires. If you choose
winter tires with a lower speed rating, never
exceed the tire’s maximum speed capability.
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Tire Sidewall Labeling
Useful information about a tire is molded into its
sidewall. The example below shows a typical
passenger (p-metric) tire sidewall.(A) Tire Size:The tire size is a combination of
letters and numbers used to de ne a particular
tire’s width, height, aspect ratio, construction
type, and service description. See the “Tire Size”
illustration later in this section for more detail.
(B) TPC Spec (Tire Performance Criteria
Speci cation):Original equipment tires designed
to GM’s speci c tire performance criteria have
a TPC speci cation code molded onto the sidewall.
GM’s TPC speci cations meet or exceed all
federal safety guidelines.
(C) DOT (Department of Transportation):
The Department of Transportation (DOT) code
indicates that the tire is in compliance with the
U.S. Department of Transportation Motor Vehicle
Safety Standards.
(D) Tire Identi cation Number (TIN):The letters
and numbers following DOT code are the Tire
Identi cation 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.
(E) Tire Ply Material:The type of cord and number
of plies in the sidewall and under the tread.
Passenger (P-Metric) Tire Example
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(F) Uniform Tire Quality Grading (UTQG):
Tire manufacturers are required to grade
tires based on three performance factors:
treadwear, traction and temperature resistance.
For more information seeUniform Tire Quality
Grading on page 396.
(G) Maximum Cold In ation Load Limit:
Maximum load that can be carried and the
maximum pressure needed to support that load.
Tire Size
The following illustration shows an example of a
typical passenger (p-metric) vehicle tire size.
(A) Passenger (P-Metric) Tire:The United States
version of a metric tire sizing system. The letter P
as the rst character in the tire size means a
passenger vehicle tire engineered to standards
set by the U. S. Tire and Rim Association.(B) Tire Width:The three-digit number indicates
the tire section width in millimeters from sidewall
to sidewall.
(C) Aspect Ratio:A two-digit number that
indicates the tire height-to-width measurements.
For example, if the tire size aspect ratio is 60,
as shown in item C of the illustration, it would
mean that the tire’s sidewall is 60 percent as
high as it is wide.
(D) Construction Code:A letter code is used
to indicate the type of ply construction in the tire.
The letter R means radial ply construction; the
letter D means diagonal or bias ply construction;
and the letter B means belted-bias ply
construction.
(E) Rim Diameter:Diameter of the wheel
in inches.
(F) Service Description:These characters
represent the load range and speed rating of
the tire. The load index represents the load
carry capacity a tire is certi ed to carry.
The load index can range from 1 to 279.
The speed rating is the maximum speed a
tire is certi ed to carry a load. Speed ratings
range from A to Z.
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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. SeeWhen It Is Time for New Tires
on page 393.
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 396.Vehicle Capacity Weight:The number of
designated seating positions multiplied by
150 lbs (68 kg) plus the rated cargo load.
SeeLoading Your Vehicle on page 309.
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 in ation pressure. See “Tire
and Loading Information Label” underLoading
Your Vehicle on page 309.
Extended Mobility Tires
Your vehicle, when new, had Goodyear Extended
Mobility Tires (EMT). There’s no spare tire, no tire
changing equipment and no place to store a tire in
the vehicle. Extended Mobility Tires perform so well
without any air that a Tire Pressure Monitor (TPM)
is used to alert you if a tire has lost pressure.
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If a tire goes at, you won’t need to stop on the side
of the road to change the tire. You can just keep on
driving. The shorter the distance you drive and the
slower the speed, the greater the chance that the
tire will not have to be replaced. If you drive on a
de ated EMT for 25 miles (40 km) or less and at
speeds of 55 mph (90 km/h) or less, there is a
good chance that the tire can be repaired. The
tire can operate effectively with no air pressure
for up to 100 miles (160 km) at speeds up to
55 mph (90 km/h), but the tire would then have to
be replaced. When a tire is lled with air, it provides
a cushion between the road and the wheel.
Because you won’t have this cushion when driving
on a de ated tire, try to avoid potholes that could
damage your wheel and require replacement of it.
Some road hazards can damage a tire beyond
repair. This damage could occur even before
you’ve driven on the tire in a de ated condition.
When a tire has been damaged, or if you’ve driven
any distance on a de ated EMT, check with an
authorized Goodyear EMT Service Center to
determine whether the tire can be repaired or
should be replaced. To maintain your vehicle’s
extended mobility feature, all replacement
tires must be Extended Mobility Tires.As soon as possible, contact the nearest
authorized GM or Goodyear EMT servicing facility
for inspection and repair or replacement. To locate
the nearest GM or Goodyear EMT servicing facility,
call Roadside Assistance. For phone numbers
and Roadside Assistance details seeRoadside
Assistance Program on page 458. You may also
contact Goodyear, for the nearest authorized EMT
servicing facility, by calling 1-800-789-9878.
{CAUTION:
Extended mobility tires are constructed
differently than other tires and could
explode during improper service. You or
others could be injured or killed if you
attempt to repair, replace, dismount, or
mount a extended mobility tire. Let only
an authorized EMT Service Center repair,
replace, dismount and mount extended
mobility tires.
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The valve stems on your extended mobility
tires have sensors that are part of the Tire
Pressure Monitor (TPM). SeeTire Pressure
Monitor System on page 389. The TPM sensors
contain batteries which are designed to last
for 10 years under normal driving conditions.
See your dealer if you ever need to have a
wheel replaced, or if the sensors ever need
replacement.
Notice:Using liquid sealants can damage
the tire valves and tire pressure monitor
sensors in your extended mobility tires.
This damage would not be covered by
warranty. Don’t use liquid sealants in
your extended mobility tires.In ation - Tire Pressure
Tires need the correct amount of air pressure
to operate effectively.
Notice:Do not let anyone tell you that
under-in ation or over-in ation is all right.
It is not. If your tires do not have enough air
(under-in ation), you can get the following:
Too much exing
Too much heat
Tire overloading
Premature or irregular wear
Poor handling
Reduced fuel economy
If your tires have too much air (over-in ation),
you can get the following:
Unusual wear
Poor handling
Rough ride
Needless damage from road hazards
A Tire and Loading Information label is attached to
the vehicle’s b-pillar. This label lists your vehicle’s
original equipment tires and shows the correct
in ation pressures for your tires when they are cold.
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The recommended cold tire in ation pressure,
shown on the label, is the minimum amount of
air pressure needed to support your vehicle’s
maximum load carrying capacity.
For additional information regarding how much
weight your vehicle can carry, and an example of
the Tire and Loading Information label, seeLoading
Your Vehicle on page 309. How you load your
vehicle affects vehicle handling and ride comfort,
never load your vehicle with more weight than it
was designed to carry.
When to Check
Check your tires once a month or more.
How to Check
Use a good quality pocket-type gage to check tire
pressure. You cannot tell if your tires are properly
in ated simply by looking at them. Radial tires
may look properly in ated even when they’re
under-in ated. Check the tire’s in ation pressure
when the tires are cold. Cold means your vehicle
has been sitting for at least three hours or driven
no more than 1 mile (1.6 km).Remove the valve cap from the tire valve stem.
Press the tire gage rmly onto the valve to
get a pressure measurement. If the cold tire
in ation pressure matches the recommended
pressure on the Tire and Loading Information
label, no further adjustment is necessary. If the
in ation pressure is low, add air until you reach
the recommended amount.
If you over ll the tire, release air by pushing on
the metal stem in the center of the tire valve.
Re-check the tire pressure with the tire gage.
Be sure to put the valve caps back on the valve
stems. They help prevent leaks by keeping out
dirt and moisture.
Tire Pressure Monitor System
Your vehicle has a Tire Pressure Monitor (TPM)
that sends tire pressure information to the Driver
Information Center (DIC). Using the DIC control
buttons, the driver is able to check tire pressure
levels in all four tires. SeeTire Pressure Monitor
System on page 389andDIC Controls and
Displays on page 208for additional information.
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