2007 SATURN SKY tire size

Tire and Loading Information Label
A vehicle specic Tire and Loading Information
label is attached to the center pillar (B-pillar)
of your vehicle. With the driver’s door open,
you will nd the label attached below the door
latch. This label shows the number of occupant
seating positions (A), and the maximum vehicle
capacity weight (B) in kilograms and pounds.The Tire and Loading Information label also shows
the size of the original equipment tires (C) and
the recommended cold tire ination pressures (D).
For more information on tires and ination see
Tires on page 284andInation - Tire Pressure
on page 292.
There is also important loading information on
the vehicle Certication label. It tells you the
Gross Vehicle Weight Rating (GVWR) and the
Gross Axle Weight Rating (GAWR) for the
front and rear axle. See “Certication Label”
later in this section.
Steps for Determining Correct Load Limit
1. Locate the statement “The combined weight of
occupants and cargo should never exceed
XXX kg or XXX lbs” on your vehicle’s placard.
2. Determine the combined weight of the driver
and passengers that will be riding in your
vehicle.
3. Subtract the combined weight of the driver
and passengers from XXX kg or XXX lbs.Label Example
226
ProCarManuals.com

Tires............................................................ 284
Winter Tires.............................................. 286
Tire Sidewall Labeling............................... 287
Tire Terminology and Denitions............... 289
Ination - Tire Pressure............................. 292
Tire Inspection and Rotation...................... 294
When It Is Time for New Tires.................. 296
Buying New Tires...................................... 296
Different Size Tires and Wheels................ 298
Uniform Tire Quality Grading..................... 299
Wheel Alignment and Tire Balance............ 300
Wheel Replacement.................................. 300
Tire Chains............................................... 303
If a Tire Goes Flat.................................... 303
Tire Inator Kit.......................................... 304
Appearance Care........................................ 315
Cleaning the Inside of Your Vehicle.......... 315
Fabric/Carpet............................................. 316
Leather...................................................... 317
Instrument Panel, Vinyl, and
Other Plastic Surfaces........................... 317
Care of Safety Belts.................................. 318
Weatherstrips............................................ 318
Washing Your Vehicle............................... 318Cleaning Exterior Lamps/Lenses................ 319
Finish Care............................................... 319
Windshield and Wiper Blades.................... 319
Convertible Top......................................... 320
Aluminum or Chrome-Plated Wheels......... 320
Tires......................................................... 321
Sheet Metal Damage................................. 321
Finish Damage.......................................... 322
Underbody Maintenance............................ 322
Chemical Paint Spotting............................ 322
Vehicle Care/Appearance Materials............ 323
Vehicle Identication.................................. 324
Vehicle Identication Number (VIN)........... 324
Service Parts Identication Label............... 324
Electrical System........................................ 325
Add-On Electrical Equipment..................... 325
Headlamp Wiring....................................... 325
Power Windows and Other
Power Options....................................... 325
Fuses and Circuit Breakers....................... 325
Floor Console Fuse Block......................... 326
Underhood Fuse Block.............................. 328
Capacities and Specications.................... 331
Section 5 Service and Appearance Care
232
ProCarManuals.com

CAUTION: (Continued)

Underinated 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 vehicle’s tires are cold. See
Inflation - Tire Pressure on page 292.
Overinated 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 the tire’s tread is badly worn, or
if your vehicle’s tires have been
damaged, replace them.Notice:If your vehicle has P245/45R18 size
tires, they are classied as low-prole
tires. Low-prole tires are more susceptible
to damage from road hazards or curb impact
than standard prole 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 Saturn Warranty does
not cover this type of damage. Keep tires
set to the correct ination pressure and when
possible avoid contact with curbs, potholes,
and other road hazards.
285
ProCarManuals.com

Winter Tires
If your vehicle has P245/45R18 size tires,
they are classied as low-prole performance
tires. These tires are designed for very responsive
driving on wet or dry pavement. If you expect to
drive on snow or ice covered roads often, you
may want to get winter tires for your vehicle.
The low-prole performance tires 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 tire tread life. After switching to winter
tires, be alert for changes in vehicle handling
and braking.See your retailer for details regarding winter tire
availability and proper tire selection. Also, see
Buying New Tires on page 296.
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.
286
ProCarManuals.com

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 dene 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
Specication):Original equipment tires designed
to GM’s specic tire performance criteria have
a TPC specication code molded onto the sidewall.
GM’s TPC specications 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 Identication Number (TIN):The letters
and numbers following DOT code are the Tire
Identication 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
287
ProCarManuals.com

(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 299.
(G) Maximum Cold Ination 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 certied to carry. The load index
can range from 1 to 279. The speed rating is
the maximum speed a tire is certied to carry a
load. Speed ratings range from A to Z.
288
ProCarManuals.com

Radial Ply Tire:A pneumatic tire in which the
ply cords that extend to the beads are laid at
90 degrees to the centerline of the tread.
Rim:A metal support for a tire and upon which
the tire beads are seated.
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 296.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. SeeUniform
Tire Quality Grading on page 299.
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 225.
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 ination pressure. See “Tire
and Loading Information Label” underLoading
Your Vehicle on page 225.
291
ProCarManuals.com

If your vehicle has Goodyear Eagle F1-GS1
P245/45R18 size tires, they are directional
tires and must roll in a certain direction for the
best overall performance. The direction is shown
by an arrow on the tire sidewall. Because
these tires are directional, they should be rotated
as shown here. These tires should only be
moved from front to rear and rear to front on
the same side of the vehicle.After the tires have been rotated, adjust the front
and rear ination pressures as shown on the
Tire and Loading Information label. SeeLoading
Your Vehicle on page 225for an example of
the Tire and Loading Information label and
its location on your vehicle. Make certain that all
wheel nuts are properly tightened. See “Wheel
Nut Torque” underCapacities and Specications
on page 331.
{CAUTION:
Rust or dirt on a wheel, or on the parts to
which it is fastened, can make wheel nuts
become loose after a time. The wheel could
come off and cause a crash. When you
change a wheel, remove any rust or dirt
from places where the wheel attaches to
the vehicle. In an emergency, you can use
a cloth or a paper towel to do this; but be
sure to use a scraper or wire brush later,
if you need to, to get all the rust or dirt off.Directional Tires
295
ProCarManuals.com