NHTSA ID Number: 11021397
Manufacturer Communication Number: No. 23-25
TSB/Document Date: 2025-08-05
Summary
Manufacturers certificate for approved wheels and tires. Vehicles affected are Type 992 (Coupé/Cabriolet): 911 GT3, 911 GT3 Touring-Package, 911 GT3 RS, 911 S/T
4
911 (992)
Manufacturer's Certificate
23/25
ENU
4400
Approved: Wheels and Tires (23/25)
Revision:
This bulletin replaces bulletin Group 4 10/24, dated December 17, 2024
Model Year:
As of 2021
Vehicle Type:
Type 992 (Coupé/Cabriolet): 911 GT3, 911 GT3 Touring-Package, 911 GT3 RS, 911 S/T
Cause:
Approval status: June 2025
Sizes:
Permissible tire and wheel sizes
(RO = rim offset in mm, FA = front axle, RA = rear axle)
Tire sizes
Wheel sizes
Snow
chains
911 GT3, 911 GT3 Touring-Package, 911 S/T
Summer (UHP)
20/21"
FA: 255/35 ZR 20 (97Y) XL
RA: 315/30 ZR 21 (105Y) XL
FA: 9.5J x 20, RO 46
RA: 12J x 21, RO 45
No
20/21"
FA: 245/35 R 20 95V XL
RA: 305/30 R 21 104V XL
FA: 9J x 20, RO 43
RA: 11.5J x 21, RO 46
RA only
Tire sizes
Wheel sizes
Snow
chains
FA: 10J x 20, RO 45
RA: 13J x 21, RO 31
No
20/21"
FA: 255/35 ZR 20 (93Y)
RA: 315/30 ZR 21 (105Y) XL
Winter
911 GT3 RS
Summer (UHP)
20/21"
FA: 275/35 ZR20 (102Y) XL
RA: 335/30 ZR21 (109Y) XL
AfterSales
Jul 11, 2025
Page 1 of 11
4
911 (992)
4400
ENU
Manufacturer's Certificate
23/25
Tire sizes
Wheel sizes
Snow
chains
FA: 9J x 20, RO 43
RA: 11.5J x 21, RO 46
RA only
Winter
20/21"
FA: 245/35 R 20 95V XL
RA: 305/30 R 21 104V XL
Wheels:
Overview of Porsche
wheels for summer (UHP) and winter tires
Identification on the inside of the wheel:
Wheel size, rim offset (RO) in mm, part number (without color code marking FFF) and Porsche logo
20/21-inch wheel "GT3"
FA: 9.5J x 20, RO 46 (summer (UHP))
Part No. 9GT.601.025.Q_FFF
RA: 12J x 21, RO 45 (summer (UHP))
Part No. 9GT.601.025.R_FFF
FA: 9J x 20, RO 43 (winter)
Part No. 9GT.601.025.B_FFF
RA: 11.5J x 21, RO 46 (winter)
Part No. 9GT.601.025.C_FFF
GT3
20/21-inch wheel “S/T”
FA: 9.5J x 20, RO 46 (summer)
Part No. 9GT.601.025.BE_FFF
RA: 11.5J x 21, RO 46 (summer)
Part No. 9GT.601.025.BF_FFF
S/T
Jul 11, 2025
Page 2 of 11
AfterSales
911 (992)
Manufacturer's Certificate
23/25
ENU
4400
4
20/21-inch wheel “GT3RS” basic wheel
FA:10J x 20, RO 45 (summer)
Part No. 9GT.601.025.AE_FFF
RA: 13J x 21, RO 31 (summer)
Part No. 9GT.601.025.T__FFF
GT3RS basic wheel
20/21-inch wheel “GT3RS” Al lightweight forged
wheel
FA:10J x 20, RO 45 (summer)
Part No. 9GT.601.025.AF_FFF
RA: 13J x 21, RO 31 (summer)
Part No. 9GT.601.025.AH_FFF
GT3RS Al lightweight forged wheel
20/21-inch wheel “GT3RS”
FA:10J x 20, RO 45 (summer)
Part No. 9GT.601.025.AL_FFF
RA: 13J x 21, RO 31 (summer)
Part No. 9GT.601.025.AM_FFF
GT3RS
AfterSales
Jul 11, 2025
Page 3 of 11
4
911 (992)
4400
ENU
Manufacturer's Certificate
23/25
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 centring clamping set for balancing.
Do not use hard brushes to clean the wheels as these can cause deep scratches that cannot be removed by
polishing.
Never use solvents or other chemical substances not approved by Porsche on tires.
Information
Only install wheels with identical part numbers on each axle.
Wheel
Mounting:
Summer (UHP):
using central wheel lock:
Tightening torque 600 Nm (442.5 ftlb.)
Tire make and type /
Label value (Link to EU database)
Tire size
911 GT3, 911 GT3 Touring-Package, 911 S/T
Michelin Pilot Sport Cup 2 N0
FA: https://eprel.ec.europa.eu/qr/410894
RA: https://eprel.ec.europa.eu/qr/408874
Goodyear Eagle F1 Super Sport R N0
No offer for 992 S/T
FA: https://eprel.ec.europa.eu/qr/530972
RA: https://eprel.ec.europa.eu/qr/530973
FA: 255/35 ZR 20 (97Y) XL
RA: 315/30 ZR 21 (105Y) XL
Goodyear Eagle F1 Super Sport RS N0
No offer for 992 S/T
FA: https://eprel.ec.europa.eu/qr/1079540
RA: https://eprel.ec.europa.eu/qr/1100069
Michelin Pilot Sport Cup 2 R N0
No offer for 992 S/T
FA: https://eprel.ec.europa.eu/qr/409102
RA: https://eprel.ec.europa.eu/qr/408957
Jul 11, 2025
Page 4 of 11
AfterSales
911 (992)
Manufacturer's Certificate
23/25
ENU
4400
4
Tire make and type /
Label value (Link to EU database)
Tire size
Pirelli P Zero Trofeo R N0
No offer for 992 S/T
FA: https://eprel.ec.europa.eu/qr/1046930
RA: https://eprel.ec.europa.eu/qr/1046931
Pirelli P-Zero Corsa N0
FA: 255/35 ZR 20 (93Y)
RA: 315/30 ZR 21 (105Y) XL
FA: https://eprel.ec.europa.eu/qr/596215
RA: https://eprel.ec.europa.eu/qr/596216
Tire make and type /
Label value (Link to EU database)
Tire size
911 GT3 RS
Michelin Pilot Sport Cup 2 N0
FA: https://eprel.ec.europa.eu/qr/1138011
RA: https://eprel.ec.europa.eu/qr/1138008
Goodyear Eagle F1 Supersport R N0
FA: https://eprel.ec.europa.eu/qr/1057890
RA: https://eprel.ec.europa.eu/qr/1057891
Pirelli P-Zero Corsa N0
FA: https://eprel.ec.europa.eu/qr/596966
RA: https://eprel.ec.europa.eu/qr/596967
FA: 275/35 ZR20 (102Y) XL
RA: 335/30 ZR21 (109Y) XL
Michelin Pilot Sport Cup 2 R N0
FA: https://eprel.ec.europa.eu/qr/1259157
RA: https://eprel.ec.europa.eu/qr/408957
Goodyear Eagle F1 Super Sport RS N0
FA: HTTPS://EPREL.EC.EUROPA.EU/QR/1585162
RA: HTTPS://EPREL.EC.EUROPA.EU/QR/1585161
Pirelli P Zero Trofeo RS N0
FA: HTTPS://EPREL.EC.EUROPA.EU/QR/1828199
RA: HTTPS://EPREL.EC.EUROPA.EU/QR/1828200
Michelin Pilot Sport S 5 N0
FA: HTTPS://EPREL.EC.EUROPA.EU/QR/2212576
RA: HTTPS://EPREL.EC.EUROPA.EU/QR/2219593
AfterSales
Jul 11, 2025
Page 5 of 11
4
911 (992)
4400
Winter Tires:
ENU
Manufacturer's Certificate
23/25
Tire make and type /
Label value (Link to EU database)
Tire size
911 GT3, 911 GT3 Touring-Package, 911 GT3 RS, 911 S/T
Michelin Pilot Alpin 5 NA5
FA: https://eprel.ec.europa.eu/qr/411084
RA: https://eprel.ec.europa.eu/qr/410097
FA: 245/35 R 20 95V XL
RA: 305/30 R 21 104V XL
Goodyear Ultragrip Performance Gen-1 NA0
FA: https://eprel.ec.europa.eu/qr/529789
RA: https://eprel.ec.europa.eu/qr/530031
Arrow with inscription “Rotation”
= Directional mounting
“Inside/Outside” inscription
= Mounting on specified side only
Arrow with inscriptions “Rotation” and
“Inside/Outside”
= Directional mounting on specified side only.
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
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.
Information
“N...” = Specification code of the tire, e.g. “N0”, “N1”, “N2” or “Nx0”, “Nx1”, “Nx2”, etc. 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.
Jul 11, 2025
Page 6 of 11
AfterSales
911 (992)
Manufacturer's Certificate
23/25
ENU
4400
4
WARNING
Driving with different 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, etc.
or Nx0, Nx1, Nx2, etc.) on a vehicle.
Tire Pressure:
WARNING
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TSB/Document ID: No. 23-25
Replacement Service Bulletin Number:
MFR Communication Date: 2025-07-12
MFR Internal Campaign ID/Software Version:
Communication Type: Service Bulletin/Repair Instructions
NHTSA Components: WHEELS
MFR Component System:
MFR Component Subsystem:
Previous TSB | Next TSB |
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