2011 SUBARU IMPREZA WRX STI tires

Black plate (394,1)
北米Model "A1110BE-C" EDITED: 2010/ 12/ 17
11-34
Maintenance and service
NOTE. The air pressure in a tire increases
by approximately 4.3 psi (30 kPa, 0.3
kgf/cm
2) when the tire becomes warm.
. The tires are considered cold when
the vehicle has been parked for at least
three hours or has been driven less
than one mile (1.6 km).
WARNING
Do not let air out of warm tires to
adjust pressure. Doing so will result
in low tire pressure.
Incorrect tire pressures detract from con-
trollability and ride comfort, and they
cause the tires to wear abnormally. .
Correct tire pressure (tread worn
evenly)
Roadholding is good, and steering is
responsive. Rolling resistance is low, so
fuel consumption is also lower. .
Abnormally low tire pressure (tread
worn at shoulders)
Rolling resistance is high, so fuel con-
sumption is also higher.

Black plate (395,1)
北米Model "A1110BE-C" EDITED: 2010/ 12/ 17
. Abnormally high tire pressure (tread
worn in center)Ride comfort is poor. Also, the tire
magnifies the effects of road-surface
bumps and dips, possibly resulting in
vehicle damage.
If the tire placard shows tire pressures for
the vehicle when fully loaded, adjust the
tire pressures to the values that match
current loading conditions.
WARNING
Driving at high speeds with exces-
sively low tire pressures can cause
the tires to deform severely and to
rapidly become hot. A sharp in-
crease in temperature could cause
tread separation, and destruction of the tires. The resulting loss of
vehicle control could lead to an
accident.
&
Wheel balanceEach wheel was correctly balanced when
your vehicle was new, but the wheels will
become unbalanced as the tires become
worn during use. Wheel imbalance causes
the steering wheel to vibrate slightly at
certain vehicle speeds and detracts from
the vehicle’ s straight-line stability. It can
also cause steering and suspension sys-
tem problems and abnormal tire wear. If
you suspect that the wheels are not
correctly balanced, have them checked
and adjusted by your SUBARU dealer.
Also have them adjusted after tire repairs
and after tire rotation.NOTELoss of correct wheel alignment*
causes the tires to wear on one side
and reduces the vehicle ’s running
stability. Contact your SUBARU dealer
if you notice abnormal tire wear.*: The suspension system is designed to hold
each wheel at a certain alignment (relative to
the other wheels and to the road) for optimum
straight-line stability and cornering perfor-
mance.
& Wear indicators1) New tread
2) Worn tread
3) Tread wear indicatorEach tire incorporates a tread wear
indicator, which becomes visible when
the depth of the tread grooves decreases
to 0.063 in (1.6 mm). A tire must be
replaced when the tread wear indicator
appears as a solid band across the tread.
WARNING
When a tire ’s tread wear indicator
becomes visible, the tire is worn
beyond the acceptable limit and
must be replaced immediately. With
a tire in this condition, driving at
high speeds in wet weather can
Maintenance and service
11-35
– CONTINUED –
11

Black plate (396,1)
北米Model "A1110BE-C" EDITED: 2010/ 12/ 17
11-36
Maintenance and service
cause the vehicle to hydroplane.
The resulting loss of vehicle control
can lead to an accident.NOTEFor safety, inspect tire tread regularly
and replace the tires before their tread
wear indicators become visible.& Tire rotation direction markExample of tire rotation direction mark
1) FrontIf the tire has the rotation direction
specification, the tire rotation direction
mark is placed on its sidewall.
When you install a tire that has the tire
rotation direction mark, install the tire with the direction mark facing forward.
&
Tire rotationVehicles equipped with 4 non-unidirec-
tional tires
1) Front
Vehicles equipped with unidirectional tires
1) FrontTire wear varies from wheel to wheel. To
maximize the life of each tire and ensure
that the tires wear uniformly, it is best to
rotate the tires every 7,500 miles (12,000
km). Move the tires to the positions shown
in the illustration each time they are
rotated.
Replace any damaged or unevenly worn
tires at the time of rotation. After tire
rotation, adjust the tires pressures 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.

Black plate (397,1)
北米Model "A1110BE-C" EDITED: 2010/ 12/ 17
& Tire replacementThe wheels and tires are important and
integral parts of your vehicle’ s design;
they cannot be changed arbitrarily. The
tires fitted as standard equipment are
optimally 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 construction 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 controllability, ride comfort, braking
performance, speedometer accuracy and
odometer accuracy. It also creates incor-
rect body-to-tire clearances and inappro-
priately changes the vehicle ’sground
clearance.
All four tires must be the same in terms of
manufacturer, brand (tread pattern), con-
struction, and size. You are advised to
replace the tires with new ones that are
identical to those fitted as standard equip-
ment.
For safe vehicle operation, SUBARU
recommends replacing all four tires at
the same time.
WARNING
. All four tires must be the same in
terms of manufacturer, brand
(tread pattern), construction, de-
gree of wear, speed symbol, load
index and size. Mixing tires of
different types, sizes or degrees
of wear can result in damage to
vehicle ’s powertrain. Use of dif-
ferent types or sizes of tires can
also dangerously reduce con-
trollability and braking perfor-
mance and can lead to an acci-
dent.
. Use only radial tires. Do not use
radial tires together with belted
bias tires and/or bias-ply tires.
Doing so can dangerously re-
duce controllability, resulting in
an accident.& Wheel replacementWhen replacing wheels due, for example,
to damage, make sure the replacement
wheels match the specifications of the
wheels that are fitted as standard equip-
ment. Replacement wheels are available
from SUBARU dealers.
WARNING
Use only those wheels that are
specified for your vehicle. Wheels
not meeting specifications could
interfere with brake caliper opera-
tion and may cause the tires to rub
against the wheel well housing dur-
ing turns. The resulting loss of
vehicle control could lead to an
accident.NOTEWhen any of the wheels are removed
and replaced for tire rotation or to
change a flat tire, always check the
tightness of the wheel nuts after driv-
ing approximately 600 miles (1,000 km).
If any nut is loose, tighten it to the
specified torque.
Maintenance and service
11-37
11

Black plate (23,1)
北米Model "A1110BE-C" EDITED: 2010/ 12/ 17
Specifications ..................................................... 12-2
Dimensions........................................................ 12-2
Engine ............................................................... 12-3
Electrical system ................................................ 12-3
Fuel ................................................................... 12-4
Engine oil .......................................................... 12-5
Manual transmission, front differential and rear differential gear oil ........................................... 12-8
Fluids ................................................................ 12-9
Engine coolant ................................................. 12-10 Tires
................................................................ 12-11
Wheel alignment .............................................. 12-11
Fuses and circuits ........................................... 12-12
Fuse panel located in the passenger
compartment ................................................. 12-12
Fuse panel located in the engine compartment ................................................. 12-14
Bulb chart......................................................... 12-16
Vehicle identification ....................................... 12-19
Specifications
12

Black plate (418,1)
北米Model "A1110BE-C" EDITED: 2010/ 12/ 17
12-2
Specifications
SpecificationsThese specifications are subject to change without notice.& Dimensions
in (mm)
Item 4-door
5-door
Non-turbo models Turbo models
Non-turbo models Turbo models
Except STI STI Except
OUTBACK OUTBACK Except STI STI
Overall length 180.3 (4,580) 173.8 (4,415)
Overall width 68.5 (1,740)70.7 (1,795) 68.5 (1,740)70.7 (1,795)
Overall height 58.1 (1,475)57.9 (1,470) 58.1 (1,475) 58.3 (1,480) 58.1 (1,475) 57.9 (1,470)
Wheel base 103.1 (2,620)103.3 (2,625) 103.1 (2,620)103.3 (2,625)
Tread Front 58.9 (1,495) 60.2 (1,530)58.9 (1,495) 58.7 (1,490) 60.2 (1,530)
Rear 58.9 (1,495)*
2
59.1 (1,500)*
3
60.6 (1,540) 58.9 (1,495)*
2
59.1 (1,500)*
3
58.9 (1,495)
60.6 (1,540)
Ground clearance*
1
6.1 (155) 5.9 (150) 6.1 (155) 6.3 (160) 6.1 (155) 5.9 (150)
*1: Measured with vehicle empty
*2: Models with 16-inch wheel tires
*3: Models with 17-inch wheel tires

Black plate (427,1)
北米Model "A1110BE-C" EDITED: 2010/ 12/ 17
& TiresTire size P205/55R16 89V P205/50R17 88V 235/45R17245/40R18
Wheel size 1666
1/2JJ 1767JJ 1768JJ 1868
1/2J
Pressure Front
33 psi (230 kPa, 2.3 kgf/cm
2)
Rear 32 psi (220 kPa, 2.2 kgf/cm2)
Temporary
spare tire Size
T125/70 D17 T135/70 D17
Pressure 60 psi (420 kPa, 4.2 kgf/cm2)
Wheel nut tightening torque 72 lbf·ft (100 N·m, 10 kgf·m)*
*: This torque is equivalent to applying approximately 88 to 110 lbf (40 to 50 kgf) at the edge of the wheel nut wrench. If you have tightened the wheel
nuts by yourself, have the tightening torque checked at the nearest automotive service facility as soon as possible.
& Wheel alignment
Item
4-door 5-door
Non-turbo models Turbo models Non-turbo models Turbo models
Except STI STI Except
OUTBACK OUTBACK Except STI STI
Toe Front 0+ 0.12 in (0 +3 mm)
Toe angle (sum of both wheels): 0 8+0815 ’
Rear
Camber* Front–0 810 ’+ 0830 ’ –0850 ’+ 0830 ’ –0845 ’+ 0830 ’ –0 810 ’+ 0830 ’ –0805 ’+ 0830 ’ –0805 ’+ 0830 ’ –0 845 ’+ 0830 ’
Rear –1 805 ’+ 0845 ’ –1835 ’+ 0845 ’ –1830 ’+ 0845 ’ –1805 ’+ 0845 ’ –1835 ’+ 0845 ’ –
1 830 ’+ 0845 ’
*: The differential between right-hand camber and left-hand camber should be within 45 ’or less. Specifications
12-11
12

Black plate (25,1)
北米Model "A1110BE-C" EDITED: 2010/ 11/ 17
For U.S.A. ........................................................... 13-2
Tire information .................................................. 13-2
Tire labeling....................................................... 13-2
Recommended tire inflation pressure .................. 13-4
Glossary of tire terminology ............................... 13-5
Tire care –maintenance and safety
practices ........................................................ 13-10
Vehicle load limit –how to determine ................ 13-10 Determining compatibility of tire and vehicle
load capacities .............................................. 13-13
Adverse safety consequences of overloading on handling and stopping and on tires ........... 13-14
Steps for Determining Correct Load Limit ......... 13-14
Uniform tire quality grading standards.......... 13-15
Treadwear....................................................... 13-15
Traction AA, A, B, C ......................................... 13-15
Temperature A, B, C ......................................... 13-15
Reporting safety defects (U.S.A.) ................... 13-16
Consumer information and Reporting safety defects
13