No. 62-20

911 (993)
Manufacturer's Certificate
62/20
ENU
4440
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Approved Tires, Wheels and Spacers (62/20)
Revision:
This bulletin replaces bulletin Group 4 07/11 and 11/11, dated May 26, 2011.
Model Year:
As of 1994 up to 1998
Vehicle Types:
911 Carrera / 911 Carrera 4 / 911 Targa / 911 Carrera RS / 911 Turbo / 911 Carrera S / 911
Carrera 4S / / 911 GT 2 (993)
Information:
Approved tires
WARNING
Driving with different tires (mixed tires)
•
Uncontrollable vehicle handling

Only use tires of the same make and type, with the same speed index and the same specification code
(N0, N1, N2, ...) on a vehicle.
MakesTypes:
Summer tire approvals
Tire size
Tire make and type
Comments /
Label value (Link to EU database)
Carrera / Carrera 4 / Targa / Carrera RS
Continental ContiSportContact N1
Continental ContiSportContact N2
205/55 ZR16 (FA)
245/45 ZR16 (RA)
Pirelli P Zero Rosso
Asimmetrico N5
Not for 993 Carrera RS
FA/RA: Data currently not available
993 Carrera mod. 94 — 98
FA/RA: Data currently not available
993 Carrera mod. 94 — 98
FA: https://eprel.ec.europa.eu/qr/596145
RA: https://eprel.ec.europa.eu/qr/596143
Pirelli P Zero Trofeo R N0
(UHP tires) N0
Yokohama 8008P N0
AfterSales
993 Carrera mod. 94 — 98
FA: https://eprel.ec.europa.eu/qr/621929
RA: https://eprel.ec.europa.eu/qr/621932
993 Carrera mod. 94 — 98
FA/RA: Data currently not available
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ENU
Manufacturer's Certificate
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Not for 993 Carrera RS
Pirelli P Zero Rosso
Asimmetrico N5
993 Carrera mod. 94 — 98
993 Carrera RS mod. 95 and 96
993 Carrera S mod. 97 and 98
FA: https://eprel.ec.europa.eu/qr/596142
RA: https://eprel.ec.europa.eu/qr/596140
Bridgestone Potenza
S-02A N4
993 Carrera mod. 94 — 98
993 Carrera RS mod. 95 and 96
993 Carrera S mod. 97 and 98
Not for 993 Carrera RS
FA/RA: Data currently not available
205/50 ZR17 (FA)
255/40 ZR17 (RA)
Continental ContiSportContact2 N2
993 Carrera mod. 94 — 98
993 Carrera RS mod. 95 and 96
993 Carrera S mod. 97 and 98
Not for 993 Carrera RS
FA/RA: Data currently not available
993 Carrera mod. 94 — 98
993 Carrera RS mod. 95 and 96
993 Carrera S mod. 97 and 98
Michelin Pilot Sport 2 N3
Not for 993 Carrera RS
FA: https://eprel.ec.europa.eu/qr/409007
RA: https://eprel.ec.europa.eu/qr/412056
Pirelli P Zero Trofeo R N0
(UHP tires) N0
993 Carrera mod. 94 — 98
993 Carrera RS mod. 95 and 96
993 Carrera S mod. 97 and 98
FA: https://eprel.ec.europa.eu/qr/621935
RA: https://eprel.ec.europa.eu/qr/621934
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911 (993)
Manufacturer's Certificate
62/20
Pirelli P Zero N4
ENU
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993 Carrera mod. 94 — 98
993 Carrera RS mod. 95 and 96
Not for Targa all model years.
Not for Cabriolet before model year 1996 (T).
FA/RA: Data currently not available
Bridgestone Potenza
S-02A N3
225/40 ZR18 (FA)
265/35 ZR 18
(RA)
993 Carrera mod. 94 — 98
993 Carrera RS mod. 95 and 96
Not for Targa all model years.
Not for Cabriolet before model year 1996 (T).
FA/RA: Data currently not available
Continental ContiSportContact2 N2
993 Carrera mod. 94 — 98
993 Carrera RS mod. 95 and 96
Not for Targa all model years.
Not for Cabriolet before model year 1996 (T).
FA/RA: Data currently not available
Pirelli P Zero Trofeo R N0
(UHP tires) N0
993 Carrera mod. 94 — 98
993 Carrera RS mod. 95 and 96
Not for Targa all model years.
Not for Cabriolet before model year 1996 (T).
FA: https://eprel.ec.europa.eu/qr/621936
RA: https://eprel.ec.europa.eu/qr/621937
Tire size
Tire make and type
Comments
Turbo / Carrera S / Carrera 4S / GT 2
Pirelli P-Zero Rosso N3
205/50 ZR17 (FA)
255/40 ZR17 (RA)
Bridgestone Potenza S-02A N4
Continental ContiSportContact2 N2
Only for 993 Carrera S
Michelin PilotSport PS2 N3
235/40 ZR18 (FA)
285/30 ZR18 (RA)
295/30 ZR18 (RA)
Pirelli P Zero Rosso N4
993 GT2 mod. 96 — 97
225/40 ZR18 (FA)
285/30 ZR18 (RA)
Pirelli P Zero Rosso N4
Bridgestone Potenza S-02A N3
Continental ContiSportContact2 N2
Michelin Pilot Sport 2 N3
993 Turbo
993 Carrera S
993 Carrera 4S
993 Turbo-Look
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ENU
Manufacturer's Certificate
62/20
Makes/Types:
Winter tire approval
Tire size
Tire make
and type
Snow-chain clearance
Comments /
Label value (Link to EU database)
Carrera / Carrera 4 / Targa / Carrera RS / Turbo / Carrera S / Carrera 4S / GT 2
205/50 R17 M+S
(FA)
255/40 R17 M+S
(RA)
225/40 R18 M+S
(FA)
265/35 R18 M+S
(RA)
Pirelli Winter
Sottozero
3 N2
Not for 993 Targa
No
FA: https://eprel.ec.europa.eu/qr/595707
RA: https://eprel.ec.europa.eu/qr/595709
Not for Cabriolet before model year 1996 (T).
Pirelli Winter
Sottozero
3 N4
Not for 993 Targa
No
FA: https://eprel.ec.europa.eu/qr/595710
RA: https://eprel.ec.europa.eu/qr/621928
Information
N... = Specification code of the tire, e.g. "N0", "N1", "N2" ... The complete "N ..." code of the tires in
question must be shown on the tire sidewall near the tire type designation.
Instructions for correct mounting of the tires are also given on the tire sidewall. If there are no mounting
instructions on the tire sidewall, the tire must be mounted so that the DOT marking is visible from the
outside.
Information
If a tire is damaged and it is not possible to determine with absolute certainty that there is no ply damage
- with all of its consequences - or if the tire was thermally and/or mechanically overloaded due to a loss of
pressure or other prior damage, replace the tire in question for safety reasons.
Repairs to "V", "W", "Y" and "ZR" tires are not permissable, as well as the use of inner tubes in tubeless
tires. Please inform your customers accordingly. It is advisable to mount winter tires at temperatures
below 45° F/7°C , because the driving characteristics of summer tires are reduced at low temperatures.
Extremely low temperatures can cause permanent damage to summer tires.
Modified adjustment values on the rear axle, standard as of vehicle identification number
WP0ZZZ99ZRS315598 (Coupé) or WP0ZZZ99ZRS331425 (Cabriolet) and all vehicles with sports
chassis "P31" before the vehicle identification numbers specified.
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Camber
-1° 10‘
Toe-in
+10‘
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911 (993)
Manufacturer's Certificate
62/20
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Before model year 1996 (T) only Coupe vehicles within the following vehicle identification number ranges
may be retrofitted with 18-inch wheels:
WP0 AA2 99 8SS 32 2696 up to WP0 ZZZ 99 8SS 32 4139 (USA and Canada).
A transverse strut, Part No. 993.347.131.02 (left-hand drive) must also be installed between the
steering gear fastening clamps, together with longer hexagon socket head bolts.
Vehicles were produced within the specified vehicle identification number ranges which were not
equipped with the body structure reinforcements necessary for 18-inch wheels. These vehicles cannot
be retrofitted with 18-inch wheels. The vehicle identification numbers of these vehicles are listed at the
end of this Manufacturer Approval document.
WARNING
Incorrect tire pressure
•
Uncontrollable vehicle handling

Adjust the tire pressure according to specifications. Never allow the pressure to fall below the minimum
pressure.

Check age of tires. Replace tires that are more than 6 years old.

Perform visual inspections.

Use new rubber valves at every tire change.

Use only tires approved by Porsche.
Tire pressure:
16-inch wheels
17-inch wheels
18-inch wheels
Front axle
2.5 bar (36 psi)
2.5 bar (36 psi)
2.5 bar (36 psi)
Rear axle
3.0 bar (44 psi)
2.5 bar (36 psi)
3.0 bar (44 psi)
Information
The tire pressure applies only to the tire makes and types approved by Porsche, and is specified for cold
tires (approx. 68° F/20°C ). The tire pressures must never be lower than the specified values.
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Sizes:
ENU
Manufacturer's Certificate
62/20
Permissible summer tire, wheel and spacer sizes (RO = rim offset in mm)
Tires
Wheels
Comments
Carrera / Carrera 4 / Targa / Carrera RS
205/55 ZR16 (FA)
245/45 ZR16 (RA)
Not for Carrera RS
205/55 ZR16 (FA)
245/45 ZR16 (RA)
Not for Carrera RS
7 J x 16, RO 55
9 J x 16, RO 70
5-mm spacers permitted
on the front axle, Part No.
996.361.605.90 (The spacer
must be removed when fitting
the cams.)
993 Carrera mod. 94 — 98:
Snow chains cannot be
installed.
7 J x 16, RO 55
9 J x 16, RO 70
5-mm spacers permitted
on the front axle, Part No.
996.361.605.90 and 17 mm
spacers on the rear axle; Part
No. 996.361.605.00 (The
spacer must be removed when
fitting the cams.)
993 Carrera mod. 94 — 98:
Snow chains cannot be
installed.
205/50 ZR17 (FA) 1
255/40 ZR17 (RA)
205/50 ZR17 (FA)
255/40 ZR17 (RA)
Not for Carrera RS
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7 J x 17, RO 50
9 J x 17, RO 55
Changed adjustment values on
the front axle, see information
under “Makes/Types”.
7 J x 17, RO 55
9 J x 17, RO 55
Changed adjustment values on
the front axle, see information
under “Makes/Types”.
AfterSales
Snow chains cannot be
installed
5-mm spacers permitted
on the front axle, Part No.
996.361.605.90 (The spacer
must be removed when fitting
the cams.)
993 Carrera mod. 94 — 98
993 Carrera RS mod. 95 and 96
993 Carrera S mod. 97 and 98
Snow chains cannot be
installed.
911 (993)
Manufacturer's Certificate
205/50 ZR17 (FA)
255/40 ZR17 (RA)
Not for Carrera RS
62/20
7 J x 17, RO 55
9 J x 17, RO 70
Changed adjustment values on
the front axle, see information
under “Makes/Types”.
8 J x 18, RO 50/52
10 J x 18, RO 65
225/40 ZR18 (FA)
265/35 ZR18 (RA)
Changed adjustment values on
the front axle, see information
under “Makes/Types”.
4440
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5-mm spacers permitted
on the front axle, Part No.
996.361.605.90 (The spacer
must be removed when fitting
the cams.)
Snow chains cannot be
installed.
Not for Targa - all model years.
Not for Cabriolet before model
year 1996 (T).
993 Carrera mod. 94 — 98
993 Carrera RS 95 and 96
Snow chains cannot be
installed.
Changed adjustment values on
the front axle, see information
under “Makes/Types”.
Tires
ENU
Wheels
Comments
Turbo / Carrera S / Carrera 4S / GT 2
Only for Carrera S
205/50 ZR 17 (FA)
255/40 ZR 17 (RA)
7 J x 17, RO 50
9 J x 17, RO 55
Only permitted with a
31-mm wheel spacer, Part
No. 996.361.631.00 (The
spacer must be removed when
fitting the cams), on each wheel
on the rear axle.
Snow chains cannot be
installed.
Only for Carrera S
205/50 ZR 17 (FA)
255/40 ZR 17 (RA)
7 J x 17, RO 50
9 J x 17, RO 55
5-mm spacer permitted on each
wheel on the front axle, Part No.
996.361.605.90 (The spacer
must be removed when fitting
the cams.) Only permitted
on the rear axle with a 31-mm
thick wheel spacer, Part No.
996.361.631.00 (The spacer
must be removed when fitting
the cams), on each wheel.
Snow chains cannot be
installed.
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225/40 ZR 18 (FA)
285/30 ZR 18 (RA)
8 J x 18, RO 50
10 J x 18, RO 65
Only permitted with a
25-mm wheel spacer, Part
No. 996.361.625.00 (The
spacer must be removed when
fitting the cams), on each wheel
on the rear axle.
Snow chains cannot be
installed.
225/40 ZR 18 (FA)
285/30 ZR 18 (RA)
225/40 ZR 18 (FA)
285/30 ZR 18 (RA)
8 J x 18, RO 52
10 J x 18, RO 40
8 J x 18, RO 50
10 J x 18, RO 47
Snow chains cannot be
installed.
Only permitted with a
5-mm wheel spacer, Part No.
996.361.605.00 (The spacer
must be removed when fitting
the cams), on each wheel on
the rear axle.
Snow chains cannot be
installed.
225/40 ZR 18 (FA)
285/30 ZR 18 (RA)
8 J x 18, RO 52
10 J x 18, RO 65
Only permitted with a
25-mm wheel spacer, Part
No. 996.361.625.00 (The
spacer must be removed when
fitting the cams), on each wheel
on the rear axle.
Snow chains cannot be
installed.
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235/40 ZR18 (FA)
285/30 ZR18 (RA)
295/30 ZR18 (RA)
8 J x 18, RO 52
10 J x 18, RO 40
10 J x 18, RO 40
993 GT 2 mod. 96 and 97
Snow chains cannot be
installed.
225/40 ZR18 (FA)
285/30 ZR18 (RA)
8 J x 18, RO 52
10 J x 18, RO 40
10 J x 18, RO 65 (25-mm
spacers on rear axle)
993 Turbo
993 Carrera S
993 Carrera 4S
993 Turbo-Look
Snow chains cannot be
installed.
AfterSales
911 (993)
Manufacturer's Certificate
Sizes:
62/20
4440
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Permissible winter tire, wheel and spacer sizes (RO = rim offset in mm)
Tires
Wheels
Snow chain
clearance
Comments
205/50 R17 M+S (FA)
255/40 R17 M+S (RA)
7 J x 17, RO 55
9 J x 17, RO 55
No
993 Carrera
993 Carrera 4
993 Carrera RS
993 Carrera
993 Carrera 4
993 Carrera RS
Not for Targa all model
years.
Not for Cabriolet before
model year 1996 (T).
225/40 R18 M+S (FA)
225/40 R18 M+S (FA)
265/35 R18 M+S (RA)
7.5 J x 18, RO 52
8 J x 18, RO 52/50
10 J x 18, RO 65
No
205/50 R17 M+S (FA)
255/40 R17 M+S (RA)
7 J x 17, RO 55
9 J x 17, RO 55 3
No
225/40 R18 M+S (FA)
225/40 R18 M+S (FA)
265/35 R18 M+S (RA)
7.5 J x 18, RO 52
8 J x 18, RO 52/50
10 J x 18, RO 65 3
No
993 Carrera S
993 Carrera 4S
993 Turbo
993 GT 2
1
Not for Carrera RS.
2
The spacer must be removed when fitting the spare wheel.
3
Changed adjustment values on the front axle, see information under “Makes/Types”.
Wheels:
Information
Improper handling can damage the wheel surface.
Carry out tire removal and mounting using a bead holding-down device only.
Use a leather pad on the rim flange to support the valve insertion tool.
Only use the Porsche centering clamping set for balancing.
Do not use brushes to clean the wheels because brushes can cause deep scratches that cannot be
removed by polishing.
Never use solvents or other chemical substances on tires.
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Overview of Porsche wheels
Identification on the inside/outside of the wheel disc:
Wheel size, rim offset (RO) in mm, Part No. and Porsche logo
Front: 7 J x 16 H2, RO 55
rear 9 J x 16 H2, RO 70
16-inch Cup Design 93 wheel
front: 7 J x 17 AH, RO 55
Rear: 9 J x 17 AH, RO 52
17-inch Cup Design wheel
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911 (993)
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Front: 7 J x 17 H2, RO 55
rear 9 J x 17 H2, RO 55
17-inch Targa wheel
Front: 7 J x 17 H2/AH, RO 55
Rear: 9 J x 17 H2/AH, RO 55/70
17-inch Cup Design 93 wheel
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Front: 7 J x 17 H2, RO 55
rear 9 J x 17 H2, RO 55
17-inch SportClassic wheel
Front: 7 J x 17 H2, RO 55
rear 9 J x 17 H2, RO 55
17-inch Carrera 4 wheel
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911 (993)
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Front: 7 J x 17 H2, RO 55
rear 9 J x 17 H2, RO 55
17-inch Carrera wheel
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Front: 7 J x 17 H2, RO 50
rear 9 J x 17 H2, RO 55
17-inch Carrera II wheel
Front: 8 J x 18 H2, RO 52
rear 10 J x 18 H2, RO 65
18-inch Turbo I wheel
front: 7.5J x 18 H2, RO 52
front: 8J x 18 H2, RO 52/50
rear 10 J x 18 H2, RO 65
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911 (993)
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Front: 8 J x 18 H2, RO 52
rear 10 J x 18 H2, RO 65
18-inch Turbo Look I wheel
Front: 8 J x 18 H2, RO 52
rear 10 J x 18 H2, RO 65
18-inch SportClassic II wheel
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Front: 8 J x 18 H2, RO 52
rear 10 J x 18 H2, RO 65
18-inch SportDesign wheel
Front: 8 J x 18 H2, RO 52
rear 10 J x 18 H2, RO 65
18-inch Carrera II wheel
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Front: 8 J x 18 H2, RO 52
rear 10 J x 18 H2, RO 65
18-inch Turbo Look II wheel
Front: 8 J x 18 H2, RO 50
rear 10 J x 18 H2, RO 65
Front: 8 J x 18 H2, RO 52
rear 10 J x 18 H2, RO 40
Front: 8 J x 18 H2, RO 50
rear 10 J x 18 H2, RO 47
Wheel Storage: •
•
•
•
•
•
•
•
General
Information:
•
•
•
•
Tires must be stored in a cool, dry and dark room with adequate ventilation.
Tires must never come into contact with fuel, oil, grease or chemicals.
Do not store summer tires in storage areas with ambient temperatures of less than 5° F (-15° C).
Complete wheel & tire assemblies can be stacked for storage; we recommend that you increase the
tire pressure by approximately 6 psi (0.4 bar).
Optimum conditions for storage of the complete wheels are provided by the Original Porsche
storage trolley, Part No. 000.044.000.38.
If the tires are not mounted on wheels, it is best to store them in a vertical position.
We recommend that you turn tires stored in this position every two weeks in order to prevent flat
spots.
Tires that are stacked in a horizontal position will become severely deformed and cannot be seated
properly in the rim flange when they are mounted.
Always use new valves when changing tires.
Always observe any possible instructions concerning the rolling direction and/or specifying which
side the tires must be mounted on.
Coat the tire beads and humps with mounting lubricant before mounting the tire. This ensures that
the tire beads will slide over the humps easily.
In order to prevent the tire from turning on the wheel, avoid extreme driving maneuvers (acceleration
and braking) during the first 100 to 200 miles with new or recently mounted tires.
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In order to optimize smoothness of rolling, it is appropriate - and necessary in individual cases - to
mount the tire in a certain (favorable) position with respect to the wheel (matching).
Matching (uncontrolled and controlled) is explained below: Uncontrolled matching:
•
Turning the tire on the wheel by 90° or 120° if necessary in order to achieve an acceptable value with
regard to rolling smoothness (true running, imbalance and weight distribution of balance weights).
Controlled matching:
•
•
•
With a balancing machine with matching program. In most cases, this produces an even better result
with regard to the rolling smoothness (true running, imbalance and weight distribution of the balance
weights) than can be achieved with uncontrolled matching.
Maximum permissible radial runout and lateral runout of the wheels < 0.7 mm. Maximum
permissible radial runout and lateral runout of the wheels with tires < 1.25 mm. Values < 1.50 mm
-ideally approx. 0.5 mm - are desirable.
The mounting pressure (seating pressure) of 58 psi/4.0 bar overpressure must not be exceeded
before both tire beads are evenly seated on the rim flange.
New Tires (Replacements):
•
•
•
•
If new tires are to be mounted or the tires of one axle are to be replaced, tires of the same make,
type and with the same specification code must always be used on each of the two axles.
If tires are replaced on one axle only, the different tread depth from that on the other axle can cause a
noticeable change in the familiar handling.
This is especially the case if new tires are mounted on the rear axle.
This effect decreases with increasing tire mileage.
When replacing a tire on an axle, make sure that the tread depth of the new tire does not differ from that of
the other tire on the same axle by more than 30 %.
Refer to WM 449503 for specific details of the vehicle you are working on.
•
•
>The 2mm specification will be given here.
> If there is none listed then the default is 30%.
Repairs to Tires:
•
•
If a tire is damaged and it cannot be determined with absolute certainty that there is no ply damage
- with all of its consequences - or if the tire was thermally or mechanically overloaded due to a loss
of pressure or other prior damage, we recommend replacement of the tire in question for safety
reasons.
Repairs to "V", "W", "Y", and "ZR" tires are not permissible, as is the use of inner tubes in tubeless
tires.
Tire Aging:
•
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Tires age due to chemical and physical processes, which can impair their function.
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911 (993)
Manufacturer's Certificate
•
•
•
•
•
•
Information:
62/20
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Tires that are stored unused for an extended period harden and become brittle faster than tires that
are in continual use.
Hairline aging cracks can occur on older tires.
On tires in continual use, the kneading action activates the plasticizer in the rubber and thereby
prevents hardening and cracking.
Therefore, attention should be paid not only to the tread depth but also to the age of the tire.
Tires should not be older than 6 years.
The age of the tire can be determined via the DOT code on the sidewall, which indicates the
production date of the tire: e.g. DOT 2201= 22nd week of 2001.
USA/Canada vehicles that cannot be retrofitted with 18-inch wheels:
99 XSS 32 2697
99 XSS 32 2750
99 6SS 32 2860
99 1SS 32 3298
99 1SS 32 2698
99 9SS 32 2755
99 9SS 32 2867
99 3SS 32 3304
99 8SS 32 2701
99 0SS 32 2756
99 9SS 32 2870
99 7SS 32 3614
99 7SS 32 2706
99 6SS 32 2759
99 1SS 32 2877
99 9SS 32 2707
99 5SS 32 2767
99 2SS 32 2886
99 2SS 32 2712
99 9SS 32 2769
99 XSS 32 2893
99 1SS 32 2720
99 5SS 32 2770
99 6SS 32 2924
99 5SS 32 2736
99 9SS 32 2772
99 3SS 32 2931
99 9SS 32 2738
99 4SS 32 2775
99 5SS 32 2932
99 0SS 32 2739
99 8SS 32 2777
99 6SS 32 2986
99 9SS 32 2741
99 XSS 32 2778
99 8SS 32 2987
99 0SS 32 2742
99 5SS 32 2784
99 0SS 32 3003
99 2SS 32 2743
99 7SS 32 2785
99 6SS 32 3006
99 4SS 32 2744
99 4SS 32 2789
99 5SS 32 3028
99 6SS 32 2745
99 0SS 32 2790
99 9SS 32 3078
99 XSS 32 2747
99 2SS 32 2791
99 4SS 32 3084
99 1SS 32 2748
99 1SS 32 2796
99 5SS 32 3210
99 3SS 32 2749
99 9SS 32 2822
99 6SS 32 3233
Important Notice: Technical Bulletins issued by Porsche Cars North America, Inc. are intended only for use by professional automotive technicians who have attended Porsche service training
courses. They are written to inform those technicians of conditions that may occur on some Porsche vehicles, or to provide information that could assist in the proper servicing of a vehicle. Porsche special
tools may be necessary in order to perform certain operations identified in these bulletins. Use of tools and procedures other than those Porsche recommends in these bulletins may be detrimental to the
safe operation of your vehicle, and may endanger the people working on it. Properly trained Porsche technicians have the equipment, tools, safety instructions, and know-how to do the job properly and
safely. Part numbers listed in these bulletins are for reference only. The work procedures updated electronically in the Porsche PIWIS diagnostic and testing device take precedence and, in the event of a
discrepancy, the work procedures in the PIWIS Tester are the ones that must be followed.
© 2021 Porsche Cars North America, Inc.
AfterSales
Jul 30, 2021
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