NHTSA ID Number: 10199879
Manufacturer Communication Number: No. 74-20
TSB/Document Date: 2021-08-04
Summary
List of approved wheels, tires, and spacers for the 924.
Freigabe/Approval
Manufacturer's Certificate
74/20
ENU
4440
4
Approved Tires, Wheels and Spacers (74/20)
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.
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.
Vehicle Types
924 Turbo, 924 Carrera GT, 924 S
Model Year:
As of 1979 up to 1988
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.
Makes/Types:
Summer tire approvals
Tire size
Tire make and
type
Comments /
Label value (link to EU database)
924 Turbo mod. 79 – 82
185/70 R15 89W (FA, RA)
Pirelli
P 6000 N3
AfterSales
924 Carrera GT, mod. 81
FA / RA:
https://eprel.ec.europa.eu/qr/596148
Jul 30, 2021
Page 1 of 15
4
Freigabe/Approval
4440
ENU
Manufacturer's Certificate
74/20
924 Turbo mod. 79 – 82
185/70 VR 15 (FA, RA)
Pirelli
CN36 N5
924 Carrera GT, mod. 81
FA/RA: Label values currently not available
924 Turbo mod. 79 – 82
185/70 R15 89V (FA, RA)
Dunlop
Sport
Classic N0
924 Carrera GT, mod. 81
FA / RA:
https://eprel.ec.europa.eu/qr/531071
924 Turbo mod. 79 – 82
195/65 R15 91W (FA, RA)
Pirelli
P 6000 N3
924 Carrera GT, mod. 81
FA/RA:
https://eprel.ec.europa.eu/qr/596147
924 Turbo mod. 79 – 82
215/60 R15 94W (FA, RA)
Pirelli
P 6000 N3
924 Carrera GT, mod. 81
FA / RA:
https://eprel.ec.europa.eu/qr/596146
924 Turbo mod. 79 – 82
215/60 VR 15 (FA, RA)
Pirelli
CN36 N5
924 Carrera GT, mod. 81
FA/RA: Label values currently not available
924 Turbo mod. 79 – 82
215/60 R15 94V (FA, RA)
Dunlop
Sport
Classic N0
Continental![]()
ContiSportContact
N2
924 Carrera GT, mod. 81
FA / RA:
https://eprel.ec.europa.eu/qr/531072
924 Turbo mod. 79 – 82
924 S, mod. 86 – 88
FA/RA: Label values currently not available
924 Turbo mod. 79 – 82
205/55 ZR16 (FA, RA)
Michelin
Pilot Exalto
2 N0
924 S, mod. 86 – 88
FA/RA:
https://eprel.ec.europa.eu/qr/408538
924 Turbo mod. 79 – 82
Pirelli
P Zero Rosso
N5
Jul 30, 2021
Page 2 of 15
AfterSales
924 S, mod. 86 – 88
FA / RA:
https://eprel.ec.europa.eu/qr/596145
Freigabe/Approval
Manufacturer's Certificate
74/20
Pirelli
P7 Cinturato
N4
Yokohama 8008P
N0
ENU
4440
4
924 Turbo mod. 79 – 82
924 S, mod. 86 – 88
FA/RA: Label values currently not available
924 Turbo mod. 79 – 82
924 S, mod. 86 – 88
FA/RA: Label values currently not available
Speed index: V = 240 km/h (150 mph), W = 270 km/h (165 mph)
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.
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
.
AfterSales
Jul 30, 2021
Page 3 of 15
4
Freigabe/Approval
4440
ENU
Manufacturer's Certificate
74/20
Wheel
Mounting:
The tightening torque for securing wheels and spacers is 130 Nm (96 ftlb.).
Sizes:
Permissible summer tire and wheel sizes (RO = rim offset in mm)
Tires
Notes
185/70 R15 89W (FA, RA)
185/70 VR 15 (FA, RA)
6Jx15, RO 36
185/70 R15 89V (FA, RA)
195/65 R15 91W (FA, RA)
924 Turbo mod. 79 – 82
7Jx15, RO 23.3
924 Carrera GT, mod. 81
215/60 R15 94W (FA, RA)
215/60 VR 15 (FA, RA)
7Jx15, RO 23.3
215/60 R15 94V (FA, RA)
205/55 ZR16 (FA, RA)
6Jx16, RO 52.3/53 (FA, RA)
924 Turbo mod. 79 – 82
7J x 16, RO 52.3/55 (RA)
924 S, mod. 86 – 88
Further detailed information about permitted wheel and tire sizes as well as spacers that may be required
can be found in the relevant parts certificates/manufacturer’s certificates held by the Porsche
partners.
Makes/Types:
Winter tire approval
Tire size
Tire make
and type
205/55 R16 94V
XL M+S (FA, RA)
225/50 R16 96V
XL M+S (FA, RA)
Snow chain
clearance
(only without
spacers)
Yes
Pirelli
W240
Sottozero
Standard II
N2
205/55 R16 94V
XL M+S (FA, RA)
Yes
924 Turbo up to model year 1982,
924 Carrera GT
FA / RA:
https://eprel.ec.europa.eu/qr/596139
924 Turbo up to model year 1982,
924 Carrera GT
FA / RA:
https://eprel.ec.europa.eu/qr/596138
924 S
No
Speed index: V = 240 km/h
Jul 30, 2021
Page 4 of 15
Comments /
Label value (link to EU database)
AfterSales
FA / RA:
https://eprel.ec.europa.eu/qr/596139
Freigabe/Approval
Manufacturer's Certificate
74/20
ENU
4440
4
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.
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
.
Sizes:
Permissible winter tire and wheel sizes (RO = rim offset in mm)
Tires
Comments
205/55 R16 94V XL M+S
(FA, RA)
6Jx16, RO 52.3/53 (FA, RA)
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TSB/Document ID: No. 74-20
Replacement Service Bulletin Number:
MFR Communication Date: 2021-07-30
MFR Internal Campaign ID/Software Version:
Communication Type: Service Bulletin/Repair Instructions
NHTSA Components: EQUIPMENT
MFR Component System:
MFR Component Subsystem:
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