NHTSA ID Number: 10198966
Manufacturer Communication Number: No. 42-21
TSB/Document Date: 2021-07-06
Summary
List of approved wheels and tires for the 918 Boxster and Cayman.
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Manufacturer's Certificate
42/21
ENU
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4
Approved Tires, Wheels and Spacers (42/21)
Revision:
This bulletin replaces bulletin Group 4 18/15, dated December 17, 2015.
Model Year:
As of 2013 up to 2016
Vehicle Type:
Boxster (981)/Boxster S (981)/Boxster GTS (981)/Boxster Spyder (981)/Cayman
(981)/Cayman S (981)/Cayman GTS (981)
Situation:
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)
Dunlop
SP Sport Maxx GT N0
(Inside/Outside)
FA/RA: Data currently not available
235/45 ZR 18 94Y
and
265/45 ZR 18 101Y
Boxster,
Boxster S
Cayman,
Cayman S
– Boxster S/Cayman
S: Only for China
(Dunlop tires only)
Goodyear Eagle F1 Asymmetric 2 N0
(Inside/Outside)
FA: https://eprel.ec.europa.eu/qr/531122
RA: https://eprel.ec.europa.eu/qr/531117
Pirelli P Zero N1
(Inside/Outside)
FA: https://eprel.ec.europa.eu/qr/595052
RA: https://eprel.ec.europa.eu/qr/595051
235/40 ZR 19 (92Y)
and
265/40 ZR 19 (98Y)
Goodyear Eagle F1 Asymmetric 2 N0
(Inside/Outside)
FA/RA: Data currently not available
Pirelli P Zero N0
(Inside/Outside)
AfterSales
Jun 21, 2021
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Model
Tire sizes
Tire make and type/
label value (link to EU database)
FA/RA: Data currently not available
Pirelli P Zero N1
(Inside/Outside)
FA: https://eprel.ec.europa.eu/qr/595050
RA: https://eprel.ec.europa.eu/qr/595049
Yokohama Advan Sport V105 N0
(Inside/Outside)
FA: https://eprel.ec.europa.eu/qr/578237
RA: https://eprel.ec.europa.eu/qr/578239
Goodyear Eagle F1 Asymmetric 2 N0
(Inside/Outside)
FA: https://eprel.ec.europa.eu/qr/531119
RA: https://eprel.ec.europa.eu/qr/531115
235/35 ZR 20 (88Y)
and
265/35 ZR 20 (95Y)
Pirelli P Zero N0
(Inside/Outside)
FA/RA: Data currently not available
Pirelli P Zero N1
(Inside/Outside)
FA: https://eprel.ec.europa.eu/qr/595048
RA: https://eprel.ec.europa.eu/qr/595047
Goodyear Eagle F1 Asymmetric 2 N0
(Inside/Outside)
FA/RA: Data currently not available
Boxster GTS,
Cayman GTS
235/40 ZR 19 (92Y)
and
265/40 ZR 19 (98Y)
Pirelli P Zero N0
(Inside/Outside)
– Boxster
GTS/Cayman GTS:
Only for China
Pirelli P Zero N1
(Inside/Outside)
FA/RA: Data currently not available
FA: https://eprel.ec.europa.eu/qr/595050
RA: https://eprel.ec.europa.eu/qr/595049
Yokohama Advan Sport V105 N0
(Inside/Outside)
Jun 21, 2021
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AfterSales
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Manufacturer's Certificate
Model
42/21
Tire sizes
ENU
4400
4
Tire make and type/
label value (link to EU database)
FA: https://eprel.ec.europa.eu/qr/578237
RA: https://eprel.ec.europa.eu/qr/578239
Goodyear Eagle F1 Asymmetric 2 N0
(Inside/Outside)
FA: https://eprel.ec.europa.eu/qr/531119
RA: https://eprel.ec.europa.eu/qr/531115
235/35 ZR 20 (88Y)
and
265/35 ZR 20 (95Y)
Pirelli P Zero N0
(Inside/Outside)
FA/RA: Data currently not available
Pirelli P Zero N1
(Inside/Outside)
FA: https://eprel.ec.europa.eu/qr/595048
RA: https://eprel.ec.europa.eu/qr/595047
Pirelli P Zero N0
(Inside/Outside)
Boxster Spyder
235/35 ZR 20 (88Y)
and
265/35 ZR 20 (95Y)
FA/RA: Data currently not available
Pirelli P Zero N1
(Inside/Outside)
FA: https://eprel.ec.europa.eu/qr/595048
RA: https://eprel.ec.europa.eu/qr/595047
Winter Tires:
Model
Boxster,
Boxster S,
Boxster GTS,
Boxster Spyder,
Cayman,
Cayman S,
Cayman GTS
Tire sizes
Tire make and type/
label value (link to EU database)
Dunlop SP Winter Sport 3D N0
(Inside/Outside)
235/45 R 18 94V
M+S and
265/45 R 18 101V
M+S
FA: https://eprel.ec.europa.eu/qr/528922
RA: https://eprel.ec.europa.eu/qr/528923
Pirelli Winter 240 Sottozero Series II N0
(Inside/Outside)
FA: https://eprel.ec.europa.eu/qr/594296
RA: https://eprel.ec.europa.eu/qr/594298
AfterSales
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Model
Tire sizes
Tire make and type/
label value (link to EU database)
Continental WinterContact TS 830 P N0
(Inside/Outside)
235/40 R 19 92V
M+S and
265/40 R 19 98V
M+S
FA: https://eprel.ec.europa.eu/qr/506096
RA: https://eprel.ec.europa.eu/qr/506089
Michelin Pilot Alpin PA4 N0
(Rotation)
FA: https://eprel.ec.europa.eu/qr/409268
RA: https://eprel.ec.europa.eu/qr/409286
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.
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.
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.
Jun 21, 2021
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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
Boxster/Cayman
Boxster S/GTS/Cayman
S/GTS
Boxster Spyder
FA
RA
FA
RA
FA
RA
18-inch
wheels
2.0 bar
200 kPa
29 psi
2.0 bar
200 kPa
29 psi
–
–
–
–
19-inch
wheels
2.0 bar
200 kPa
29 psi
2.1 bar
210 kPa
30 psi
2.0 bar
200 kPa
29 psi
2.1 bar
210 kPa
30 psi
–
–
20-inch
wheels
2.3 bar
230 kPa
33 psi
2.3 bar
230 kPa
33 psi
2.3 bar
230 kPa
33 psi
2.3 bar
230 kPa
33 psi
2.3 bar
230 kPa
33 psi
2.3 bar
230 kPa
33 psi
Standard tire pressure for winter tires
Wheel size
Boxster/Cayman
Boxster S/GTS/Boxster
Spyder/Cayman S/GTS
FA
RA
FA
RA
18-inch wheels
2.2 bar
220 kPa
31 psi
2.2 bar
220 kPa
31 psi
2.2 bar
220 kPa
31 psi
2.2 bar
220 kPa
31 psi
19-inch wheels
2.2 bar
220 kPa
31 psi
2.2 bar
220 kPa
31 psi
2.2 bar
220 kPa
31 psi
2.2 bar
220 kPa
31 psi
AfterSales
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Manufacturer's Certificate
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Comfort tire pressure for summer tires up to 270 km/h (165 mph) – only for vehicles
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TSB/Document ID: No. 42-21
Replacement Service Bulletin Number:
MFR Communication Date: 2021-06-21
MFR Internal Campaign ID/Software Version:
Communication Type: Service Bulletin/Repair Instructions
NHTSA Components: WHEELS
MFR Component System:
MFR Component Subsystem:
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