2004 PORSCHE 911 GT3 wheel alignment

Temperature A,8,C

The temperature gradesareA(the highest), Band
C, representing thetire's resistance tothe gener-
ation ofheat anditsability todissipate heatwhen
tested undercontrolled conditions onaspecified
indoor laboratory testwheel.
Sustained hightemperatures cancause themate-
rial ofthe tire todegenerate andreduce tirelife,
and excessive temperature canlead tosudden
tire failure.
The grade Ccorresponds toalevel ofperfor-
mance whichallpassenger cartires must meet
under theFederal MotorVehicle SafetyStandard

No. 109.

Grades Band Arepresent higherlevelsofperfor-
mance onthe laboratory testwheel thanthemini-
mum required bylaw.

A
Warning!

The temperature gradeforthis tireisestablished
for atire that isproperly inflatedandnotoverload-

ed.

Excessive speed,underinflation, orexcessive
loading, eitherseparately orincombination, can
cause heatbuildup andpossible tirefailure.
Tire
pressures

A
Warning!
Incorrect tirepressure causesincreased tire
wear andadversely affectsroadhandling.

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Always useanaccurate tirepressure gauge
when checking inflationpressures.

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Donot exceed themaximum tirepressure list-
ed onthe tire sidewall.
Please observe thechapter "VEHICLE IDENTI-
FICATION, TECHNICAL DATA"onPage 179.

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Cold tireinflation pressure means:alltires
must becold, ambient temperature maximum
68°F (20°C), whenadjusting theinflation pres-
sure.
Avoid sunlight strikingthetires before measur-
ing cold pressures, sincethepressures would
rise from temperature influence.

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Valve capsprotect thevalve fromdustand
dirt, andthus from leakage.
Always screwcapstightly down.
Replace missingcapsimmediately.

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Donot use commercially availablesealantor
tire inflating bottles.
Tire
traction

A
Warning!
When driving onwet orslushy roads,a
wedge ofwater maybuild upbetween the
tires andtheroad. Thisphenomenon is
known as"hydroplane" andmay cause par-
tial orcomplete lossoftraction, vehicle
control orstopping ability.
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Reduce speedonwet surface toprevent this.

Tire life

Tire lifedepends onvarious factors, i.e., road
surfaces, trafficandweather conditions, driving
habits, typeoftires andtirecare.

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Inspect yourtires forwear anddamage before
driving off.Ifyou notice uneven orsubstantial
wear, wheels mightneedalignment ortires
should bebalanced orreplaced.
Practical Tips,Emergency Service

Tirewear

The original equipment tiresonyour Porsche have
built-in tirewear indicators. Theyaremolded into
the bottom ofthe tread grooves andwillappear as
approximately 1/2in(12 mm) bands whenthetire
tread depth isdown to1/16 ofan in(1.6 mm).
When theindicators appearintwo ormore adja-
cent grooves, itis time toreplace thetires. We
recommend, however,thatyoudonot letthe tires
wear down tothis extent.
Worn tirescannot griptheroad surface properly
and areeven lesseffective onwet roads.
In the United States, statelawsmaygovern the
minimum treaddepth permissible. Followallsuch
laws.
PracticalTips,Emergency Service
/!\

Warning!
Driving onworn tirescanresult inloss of
control ofthe vehicle andcould cause severe
personal injuries.

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Donot drive withworn tiresortires showing
cuts orbruises asthey mayleadtosudden
deflation andloss ofcontrol whichcouldcause
severe personal injury.

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Specialized highperformance tiresonhigh
performance sportscarsexhibit morewear
than those onafamily sedan, oreven ahigh
performance sedan.
Therefore, itis important tocheck yourtire
pressure andcondition atleast every two
weeks.
If you notice thattires arewearing unevenly, con-
sult your Porsche dealer.
Uneven wearmaynotalways bedue toimproper
wheel alignment. Itcan bethe result ofindividual
driving habitssuchascornering athigh speeds. If
the tire pressure isnot checked andadjusted
regularly, abnormal tirewear canalso occur.
Tire
care

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Avoid damaging tiresandwheel rims.

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Ifyou must driveoveracurb orother obstacle,
drive slowly andatan obtuse angle.

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Check tiresforuneven wearanddamage
before driving off.

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Remove imbedded material.

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Replace wornordamaged tiresimmediately.

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Keep oil,fuel, brake fluid,etc.away fromtires.

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Replace missingvalvestemcaps.

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Keep tiresinflated correctly.

Wheelalignment, wheelbalancing

As aprecaution, havewheels withsummer tires
balanced
in
the spring, andthose withmud and
snow tiresbefore winter.
Unbalanced wheelsmayaffect carhandling and
tire life.
Only thespecified weightsmaybeused forwheel
balancing. Self-adhesive weightsmustnotcome intocontact
with cleaning agents,sincetheycould dropoff.
A wheel should always bebalanced afteratire re-
pair.
Uneven treadwearindicates wheelimbalance. In
this event, thevehicle shouldbechecked atan au-
thorized Porschedealer.

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Warning!
If, during ajourney, unevenrunning orvibra-
tions occur thatcould becaused bydamage
to tires orthe car, thespeed mustbere-
duced immediately, butwithout braking
sharply.
If you continue yourtripwithout havingthe
cause ofthe fault remedied, youmight lose
control ofyour vehicle whichcouldcause se-
vere personal injury.

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Stop thevehicle andcheck thetires.

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Ifno cause forthe fault canbefound, drive
carefully tothe nearest authorized Porsche
dealer.
Practical Tips,Emergency Service
Removing
andstoring tires

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After changing, adjusttirepressure andtorque
wheel boltsdiagonally to94 ftlb (130 Nm).
Please observe thechapter "CHANGING A
WHEEL" onPage 150.

Tires mustalways remain onthe same side
of the vehicle.

When wheels areremoved, thedirection ofrota-
tion andposition ofeach wheel should bemarked.

Example

FR (front right), FL,RRand RL.
Wheels mustalways befitted inaccordance with
their marking.
The preception thattiredurability andperfor-
mance areimmune tothe effects ofstorage and
age isunfounded.
Chemical additives, whichmaketherubber elas-
tic, lose their effectiveness inthe course oftime
and therubber becomes brittleandcracks.

Therefore, thetires should beinspected
from timetotime. Note

Under nocircumstances shouldtiresolder than6
years beused onyour Porsche.
The ageofthe tire can beobtained fromthe"DOT"
code number. If,for example, thelast four num-
bers read 1203, thenthetire was produced inthe
12th week of2003.

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Store tiresinacool anddryplace.

Snow tires

For abetter griponsnow andice,useradial M+S
tires withstuds.
Check withyour local Motor Vehicle Bureaufor
possible restrictions.

/!\.
Warning!
Risk ofloss ofcontrol anddamage tothe
vehicle aswell assevere personal injury.
The standard tiresprofile andrubber mix-
ture areoptimized forwet and drydriving
conditions, andmay notprove favorable for
snow conditions.

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Therefore installM+Stiresbefore driving in
such conditions.