911 (991)

Manufacturer's Certificate

34/21

ENU

4400

4

Approved Tires, Wheels and Spacers (34/21)

Revision:

This bulletin replaces bulletin Group 4, 20/15, dated December 17, 2015.

Model Year:

2014

Vehicle Type:

Anniversary Edition 50 years 911 (991)

Information:

Approval status: May 2021

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.

Summer Tires:

Model

Tire sizes

Tire make and type/
label value (link to EU database)

Anniversary Edition
50 years 911

245/35 ZR 20 (91Y)
and
305/30 ZR 20 (103Y)
XL

Pirelli P-Zero N0
(Inside/Outside)
FA/RA: Data currently not available
FA: https://eprel.ec.europa.eu/qr/594338
RA: https://eprel.ec.europa.eu/qr/594467
Pirelli P-Zero N1
(Inside/Outside)
FA: https://eprel.ec.europa.eu/qr/595261
RA: https://eprel.ec.europa.eu/qr/595262

AfterSales

Jun 17, 2021
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4

911 (991)
4400

Winter Tires:

ENU

Manufacturer's Certificate

34/21

Model

Tire sizes

Anniversary Edition
50 years 911

Tire make and type/
label value (link to EU database)
Pirelli Winter 240 Sottozero Series II N0
(Inside/Outside)
FA: https://eprel.ec.europa.eu/qr/594295

235/40 R 19 92V
M+S and
295/35 R 19 100V
M+S

RA: https://eprel.ec.europa.eu/qr/594294
Continental WinterContact TS 830P N0
(Inside/Outside)
RA: https://eprel.ec.europa.eu/qr/506095
Continental WinterContact TS 830P N1
(Inside/Outside)
FA: https://eprel.ec.europa.eu/qr/506096

245/35 R 20 91V
M+S and
295/30 R 20 97V
M+S

Michelin Pilot Alpin PA4 N0
(Rotation)
FA/RA: Data currently not available
Pirelli Winter 240 Sottozero Serie II N0
(Inside/Outside)
FA: https://eprel.ec.europa.eu/qr/594297
RA: https://eprel.ec.europa.eu/qr/594293

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.

Jun 17, 2021
Page 2 of 10

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.

AfterSales

911 (991)

Manufacturer's Certificate

34/21

ENU

4400

4

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.
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 only tires recommended 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. 68° F/20°C ). The tire pressures must never be lower than the specified values.
Standard tire pressure for summer tires
Wheel size
20-inch wheels

Part load

Full load

FA

RA

FA

RA

2.2 bar
(31 psi)

2.7 bar
(39 psi)

2.5 bar
(36 psi)

3.1 bar
(44 psi)

Standard tire pressure for winter tires
Wheel size

Part load

Full load

FA

RA

FA

RA

19-inch wheels

2.2 bar
(31 psi)

2.4 bar
(34 psi)

2.4 bar
(34 psi)

2.6 bar
(38 psi)

20-inch wheels

2.2 bar
(31 psi)

2.4 bar
(34 psi)

2.4 bar
(34 psi)

2.8 bar
(40 psi)

AfterSales

Jun 17, 2021
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911 (991)
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ENU

Manufacturer's Certificate

34/21

Comfort tire pressure for summer tires up to 270 km/h (165 mph) – only for vehicles with TPM
and “Comfort pressure” menu in the multi-function display (depending on the country)
Wheel
size
20-inch
wheels
Sizes:

Part load

Full load

Part load

Full load

FA

RA

FA

RA

FA

RA

FA

RA

2.2 bar
(31 psi)

2.4 bar
(34 psi)

2.2 bar
(31 psi)

2.8 bar
(40 psi)

2.2 bar
(31 psi)

2.4 bar
(34 psi)

2.2 bar
(31 psi)

2.8 bar
(40 psi)

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

Tire sizes

Wheel sizes

Summer

FA: 245/35 ZR 20 (91Y)
RA: 305/30 ZR 20 (103Y) XL

FA: 8.5 J x 20 H2, RO 51
RA: 11 J x 20 H2, RO 52
FA: 9 J x 20 H2, RO 51
RA: 11.5 J x 20 H2, RO 48

Snow
chains