2004 SUBARU IMPREZA WRX wheel size

8-7
Driving tips
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Driving tips for AWD vehicles
All wheel drive distributes the engine power to all four
wheels. AWD vehicles provide better traction when
driving on slippery, wet or snow-covered roads and
when moving out of mud, dirt and sand. By shifting
power between the front and rear wheels, SUBARU
AWD can also provide added traction during acceler-
ation and added engine braking force during deceler-
ation.
Therefore, your SUBARU AWD vehicle may handle
differently than an ordinary two wheel drive vehicle
and it contains some features unique to AWD. For safety purposes as well as to avoid damaging the
AWD system, you should keep the following tips in mind: "
An AWD vehicle is better able to climb steeper
roads under snowy or slippery conditions than a two
wheel drive vehicle. There is little difference in han-
dling, however, during extremely sharp turns or sud-
den braking. Therefore, when driving down a slope or
turning corners, be sure to reduce your speed and
maintain an ample distance from other vehicles." When replacing a tire, make sure you use only the
same size, construction, brand, and load range as the
original tires listed on the tire placard. Using other siz-
es, circumference or construction may result in severe
mechanical damage to the drive train of your vehicle
and may affect ride, handling, braking, speedometer/
odometer calibration, and clearance between the body
and tires. It also may be dangerous and lead to loss of
vehicle control." If you use a temporary spare tire to replace a flat
tire, be sure to use the original temporary spare tire
stored in the vehicle. Using other sizes may result in
severe mechanical damage to the drive train of your
vehicle. " Always check the cold tire pressure before starting
to drive. The recommended tire pressure is provided
on the tire placard, which is located under the door
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8-16
Driving tips
dent.
Your vehicle is equipped with “summer tires” as origi-
nal equipment, which are inadequate for driving on
slippery roads such as on snow-covered or icy roads.
Compared with winter and all-season tires, summer
tires give significantly less grip on snowy and icy road
surfaces. Therefore, use of winter tires is strongly rec-
ommended when driving with such road conditions.
When you choose to install winter tires on your vehi-
cle, be sure to use the correct tire size and type. You
must install four winter tires that are of the same size,
construction, brand and load range and you should
never mix radial, belted bias or bias tires since this
may result in dangerous handling characteristics.
When you choose a tire, make sure that there is
enough clearance between the tire and vehicle body.
Remember to drive with care at all times regardless of
the type of tires on your vehicle. ! Tire chains
Driving on snowy grades or icy roads may require the
use of tire chains, in which case put the chains on the
front wheels only. Use only SAE class S type chains
that are of the correct size for your tires so as not to damage the vehicle body or suspension.
When driving with tire chains, drive at speeds below
19 mph (30 km/h).
When a temporary spare tire is on a front wheel, re-
place the temporary spare tire with the rear tire on the
same side of the vehicle, and then fit chains on the
front tires.
Always use the utmost care when driving with tire
chains — overconfidence because you are driving
with tire chains could easily lead to a serious accident.
Tire chains cannot be used on tires listed below
because of lack of clearance between the tires
and vehicle body. "
225/45R17 tires for WRX-STi
"Optional 215/45R17 tires for WRX
! Rocking the vehicle
If you must rock the vehicle to free it from snow, sand,
or mud, depress the accelerator pedal slightly and
move the selector lever back and forth between “D”
and “R” repeatedly. Do not race the engine. For the
best possible traction, avoid spinning the wheels when

8-29
Driving tips
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Trailer towing
Your car is designed and intended to be used primarily
as a passenger-carrying vehicle. Towing a trailer puts
additional loads on your car’s engine, drivetrain,
brakes, tires and suspension and has an adverse ef-
fect on fuel economy.
If you do decide to tow a trailer, your safety and satis-
faction depend upon proper use of correct equipment
and cautious operation of your vehicle. Seek the ad-
vice of your SUBARU dealer to assist you in purchas-
ing a hitch and other necessary towing equipment ap-
propriate for your vehicle. In addition, be sure to follow
the instructions on correct installation and use provid-
ed by the trailer and other towing equipment manufac-
turers.
SUBARU assumes no responsibility for injuries or ve-
hicle damage that result from trailer towing equipment,
or from any errors or omissions in the instructions ac-
companying such equipment or for your failure to fol-
low the proper instructions. !Warranties and maintenance
SUBARU warranties do not apply to vehicle damage
or malfunction caused by trailer towing. If you use your
vehicle to tow a trailer, more frequent maintenance will
be required due to the additional load. (Refer to “Main- tenance schedule under severe driving conditions” in
the “Warranty and Maintenance Booklet”.)
Under no circumstances should a trailer be towed with
a new vehicle or a vehicle with any new powertrain
component (engine, transmission, differential, wheel
bearings, etc.) for the first 1,000 miles (1,600 km) of
driving. !
Maximum load limits
Never exceed the maximum load limits ex-
plained below. Exceeding the maximum load
limits could cause personal injury and/or vehi-
cle damage.
"Adequate size trailer brakes are required
when the trailer and its cargo exceed 1,000 lbs
(453 kg) total weight." Before towing a trailer, check the trailer total
weight, GVW, GAWs and tongue load. Make
sure the load and its distribution in your vehicle

9-4
In case of emergency
1) Spare fuse
2) FWD connector
NOTE
(If your vehicle is AWD with automatic transmis-
sion, except Turbo models) Before driving your
vehicle with the temporary spare tire, put a sparefuse inside the FWD connector in the main fuse
box located in the engine compartment and con-
firm that the Front-wheel drive warning light
“FWD” in the combination meter comes on. The all
wheel drive capability of the vehicle has now deac-
tivated. After re-installing the conventional tire, re-
move the spare fuse from the FWD connector in
order to reactivate all wheel drive.
Never tow a trailer when the temporary spare
tire is used. The temporary spare tire is not de-
signed to sustain the towing load. Use of the
temporary spare tire when towing can result in
failure of the spare tire and/or less stability of
the vehicle and may lead to an accident.
Never use any temporary spare tire other than
the original. Using other sizes may result in se-
vere mechanical damage to the drive train of
your vehicle.
1
2
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10-3
Appearance care
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flush the suspension and axle parts, as they are par-
ticularly prone to mud and sand buildup. Do not use a
sharp-edged tool to remove caked mud.
NOTE
Be careful not to damage brake hoses, sensor har-
nesses, and other parts when washing suspen-
sion components. !Using a warm water washer
" Keep a good distance of 12 in (30 cm) or more be-
tween the washer nozzle and the vehicle. " Do not wash the same area continuously.
" If a stain will not come out easily, wash by hand.
Some warm water washers are of the high tempera-
ture, high pressure type, and they can damage or de-
form the resin parts such as mouldings, or cause wa-
ter to leak into the vehicle. ! Waxing and polishing
Always wash and dry the vehicle before waxing and
polishing.
Use a good quality polish and wax and apply them ac-
cording to the manufacturer’s instructions. Wax or pol-
ish when the painted surface is cool.
Be sure to polish and wax the chrome trim, as well as
the painted surfaces. Loss of wax on a painted surface leads to loss of the original luster and also quickens
the deterioration of the surface. It is recommended
that a coat of wax be applied at least once a month, or
whenever the surface no longer repels water.
If the appearance of the paint has diminished to the
point where the luster or tone cannot be restored,
lightly polish the surface with a fine-grained com-
pound. Never polish just the affected area, but include
the surrounding area as well. Always polish in only
one direction. A No. 2000 grain compound is recom-
mended. Never use a coarse-grained compound.
Coarser grained compounds have a smaller grain-size
number and could damage the paint. After polishing
with a compound, coat with wax to restore the original
luster. Frequent polishing with a compound or an in-
correct polishing technique will result in removing the
paint layer and exposing the undercoat. When in
doubt, it is always best to contact your SUBARU deal-
er or an auto paint specialist.
NOTE
Be careful not to block the windshield washer noz-
zles with wax when waxing the vehicle. !
Cleaning aluminum wheels
" Promptly wipe the aluminum wheels clean of any
kind of grime or agent. If dirt is left on too long, it may

11 - 5 0
Maintenance and service
!
Tire rotation
Tire wear varies from wheel to wheel. To maximize the
life of each tire and ensure that the tires wear uniform-
ly, it is best to rotate the tires every 7,500 miles
(12,500 km). Rotating the tires involves switching the
front and rear tires on the right-hand side of the vehicle
and similarly switching the front and rear tires on the
left-hand side of the vehicle. (Each tire must be kept
on its original side of the vehicle.)
Replace any damaged or unevenly worn tire at the
time of rotation. After tire rotation, adjust the tire pres-
sures and make sure the wheel nuts are correctly
tightened. After driving approximately 600 miles (1,000 km),
check the wheel nuts again and retighten any nut that
has become loose. !
Tire replacement
The wheels and tires are important and integral parts
of your vehicle’s design; they cannot be changed arbi-
trarily. The tires fitted as standard equipment are opti-
mally matched to the characteristics of the vehicle and
were selected to give the best possible combination of
running performance, ride comfort, and service life. It
is essential for every tire to have a size and construc-
tion matching those shown on the tire placard and to
have a speed symbol and load index matching those
shown on the tire placard.
Using tires of a non-specified size detracts from con-
trollability, ride comfort, braking performance, speed-
ometer accuracy and odometer accuracy. It also cre-
ates incorrect body-to-tire clearances and inappropri-
ately changes the vehicle’s ground clearance.
All four tires must be the same in terms of manufactur-
er, brand (tread pattern), construction, and size. You
are advised to replace the tires with new ones that are
identical to those fitted as standard equipment.
For safe vehicle operation, SUBARU recommends re-
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11 -5 1
Maintenance and service
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placing all four tires at the same time.
NOTE
Unidirectional tires: Some tires have a specified
direction of rotation. A tire of this type has an ar-
row or other mark on its side wall to indicate the
direction of rotation. Install it so that the direction
of rotation is correct when the vehicle is drivenforward.
"All four tires must be the same in terms of
manufacturer, brand (tread pattern), construc-
tion, degree of wear, speed symbol, load index and size. Mixing tires of different types, sizes or
degrees of wear can result in damage to vehi-
cle’s power train. Use of different types or sizes
of tires can also dangerously reduce controlla-
bility and braking performance and can lead to
an accident."
Use only radial tires. Do not use radial tires
together with belted bias tires and/or bias-ply
tires. Doing so can dangerously reduce control-
lability, resulting in an accident.
! Wheel replacement
When replacing wheels due, for example, to damage,
make sure the replacement wheels match the specifi-
cations of the wheels that are fitted as standard equip-
ment. Replacement wheels are available from SUBA-
RU dealers.
Use only those wheels that are specified for
your vehicle. Wheels not meeting specifica-
tions could interfere with brake caliper opera-
tion and may cause the tires to rub against the
wheel well housing during turns. The resulting
loss of vehicle control could lead to an acci-
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12-5
Specifications
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!Tires
! Wheel alignment
Tire sizeP195/60R15 87HP205/55R16 89V215/45R17 87W225/45R17 90W
Wheel size15 × 6 JJ16 × 6 1
/2 JJ17
× 7 JJ17 × 7 1
/2 JJ
PressureFront32 psi (220 kPa, 2.2 kg/cm 2
)33 psi (230 kPa,
2.3 kg/cm 2
)36 psi (250 kPa,
2.5 kg/cm 2
)
Rear29 psi (200 kPa, 2.0 kg/cm 2
)32 psi (220 kPa,
2.2 kg/cm 2
)30 psi (210 kPa,
2.1 kg/cm 2
)
Temporary spare tireSizeT135/70 D16T135/70 D17
Pressure60 psi (420 kPa, 4.2 kg/cm 2
)
ItemSedanWagon
2.5-liter non-
turbo2.0-liter turbo2.5-liter turbo2.5-liter non-turbo2.0-liter turbo
RSWRXWRX-STiTSOUTBACK SPORTWRX
Drive systemAWD
ToeFront0 mm (0 in)
Rear0 mm (0 in)
CamberFront−0 °15’− 0 °25’− 0 °30’− 0 °10’− 0 °05’− 0°20’
Rear− 1 °25’− 1 °30’− 1 °40’− 1 °15’− 1 °10’− 1°20’