981

Manufacturer's Certificate

24/25

ENU

4400

4

Approved: Wheels and Tires (24/25)
Revision:

This bulletin replaces bulletin Group 4 62/22, dated January 6, 2023.

Model Year:

2016

Vehicle Type:

Cayman GT4 (981)

Cause:

Approval status: June 2025

WARNING
Driving with different tires (mixed tires)
•

Uncontrollable vehicle handling

Þ
⇒

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.
WARNING

Driving with sports tires
•

Aquaplaning on wet or muddy roads

Þ
⇒

Reduce speed.

Þ
⇒

Drive according to the road conditions.

Summer Tires:

The Cayman GT4 vehicles are installed as standard with sports tires that were developed specifically for
motor sports.
(FA = front axle, RA = rear axle)
Model

Tire size

Tire make and type /
Label value (Link to EU database)

Cayman GT4

FA: 245/35 ZR 20
(95Y)
RA: 295/30 ZR 20
(101Y) XL

Michelin Pilot Sport Cup 2 N1
(Inside/Outside)
FA: https://eprel.ec.europa.eu/qr/411697
RA: https://eprel.ec.europa.eu/qr/408334
Dunlop Sport Maxx Race N2
(Inside/Outside)
FA: https://eprel.ec.europa.eu/qr/863165
RA: https://eprel.ec.europa.eu/qr/530930

AfterSales

Aug 12, 2025
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981
4400

ENU

Manufacturer's Certificate

24/25

Information
Sports tires (Ultra High Performance Tires) are permitted on public roads and satisfy all legal requirements
and road safety criteria.
These tires are also designed for use on racing circuits (driving safety training courses, sports driving schools,
Clubsport events) and offer distinct advantages with regard to dry adhesion and wear-and-tear compared to
normal road tires.
The main features are a reduced tread depth as well as a special thread design and substructure.
Winter Tires:

Model

Tire sizes

Tire make and type /
Label value (Link to EU database)

Cayman GT4

FA: 235/35 R 20 92V
M+S
RA: 275/30 R 20
97V M+S

Michelin Pilot Alpin PA4 N0
(Rotation)

FA: 245/35 R 20 91V
M+S
RA: 295/30 R 20
97V M+S

Pirelli Winter 240 Sottozero Series II N0
(Inside/Outside)

FA: 245/35 R 20 91V
M+S
RA: 295/30 R 20
101V M+S

Michelin Pilot Alpin PA4 N1

FA: https://eprel.ec.europa.eu/qr/410187
RA: https://eprel.ec.europa.eu/qr/412446

FA: https://eprel.ec.europa.eu/qr/594297
RA: https://eprel.ec.europa.eu/qr/594293
FA: https://eprel.ec.europa.eu/qr/412844
RA: https://eprel.ec.europa.eu/qr/411498

Information
In principle, only tires that at least correspond to the maximum vehicle speed may be installed on the vehicle.
There may be national exemptions for winter tires marked for M+S and 3PMSF (3 peak mountain snow flake),
which also permit tires that do not correspond to the maximum vehicle speed.

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.

Aug 12, 2025
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AfterSales

981

Manufacturer's Certificate

24/25

ENU

4400

Arrow with inscription “Rotation”

= Directional mounting

“Inside/Outside” inscription or “Left” or “Right”

= Mounting on specified side only

Arrow with both inscriptions “Rotation” and
“Inside/Outside”

= directional mounting on specified side only.

Arrow with both inscriptions “Rotation” and “Left” or
“Right”

= directional mounting on specified side only.

4

Information
As a general rule, Porsche does not recommend having tires repaired. Local legislation must always be
observed.
It is advisable to install winter tires for temperatures below 7 °C (44 °F), because the driving characteristics
of summer tires and UHP tires are reduced at low temperatures. Subfreezing temperatures can cause
permanent damage to summer tires and UHP tires.
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 by more than 30%. If this value is exceeded, we recommend that you replace both tires.
WARNING
Incorrect tire pressure
•

Uncontrollable vehicle handling

Þ
⇒

Adjust the tire pressure according to specifications. Never allow the pressure to fall below the minimum pressure.

Þ
⇒

Check age of tires. Recommendation: Replace tires that are more than 6 years old.

Þ
⇒

Perform visual inspections.

Þ
⇒

Use only tires approved by Porsche.

Tire Pressure:
Information
The tire pressure applies only to the tire makes and types approved by Porsche and is specified for cold tires
(approx. 20 °C/ 68 °F). The tire pressure must not be lower than the specified values.
Standard tire pressure for summer tires

20-inch wheels

FA

RA

2.0 bar
(29 psi)

2.3 bar
(33 psi)

AfterSales

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981
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Manufacturer's Certificate

24/25

Standard tire pressure for winter tires

20-inch wheels
Sizes:

FA

RA

2.5 bar
(36 psi)

2.5 bar
(36 psi)

Permissible tire and wheel sizes
(RO = rim offset in mm, FA = front axle, RA = rear axle)
Tires

Snow
chains

Tire sizes

Wheel sizes

Summer

FA: 245/35 ZR 20 (91Y)
RA: 295/30 ZR 20 (101Y) XL

FA: 8.5 J x 20 H2, RO 61
RA: 11 J x 20 H2, RO 50

No

Winter

FA: 235/35 R 20 92V M+S
RA: 275/30 R 20 97V M+S