NHTSA ID Number: 10245050
Manufacturer Communication Number: No. 26-23
TSB/Document Date: 2023-11-07
Summary
Instructions on the manufacturers certificate for approved wheels and tires.
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TSB/Document ID: No. 26-23
Replacement Service Bulletin Number:
MFR Communication Date: 2023-10-10
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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4
911 (992)
Manufacturer's Certificate
26/23
ENU
4400
Approved: Wheels and Tires (26/23)
Revision;
This bulletin replaces bulletin Group 4 11/23, dated August 4, 2023.
Model Year:
As of 2021
Vehicle Type:
Type 992 : 911 GT3, 911 GT3 Touring package, 911 GT3 RS
Information:
Approval status: July 2023
Sizes:
Permissible summer tires and wheel sizes
(RO = rim offset (ET = Einpresstiefe) in mm, FA = front axle, RA = rear axle)
Tire sizes
Wheel sizes
Snow
chains
911 GT3, 911 GT3 Touring package
Summer (UHP)
20/21– inch
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– inch
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– inch
FA: 255/35 ZR 20 (93Y)
RA: 315/30 ZR 21 (105Y) XL
Winter
911 GT3 RS
Summer (UHP)
20/21– inch"
FA: 275/35 ZR20 (102Y) XL
RA: 335/30 ZR21 (109Y) XL
AfterSales
Oct 10, 2023
Page 1 of 9
4
911 (992)
4400
ENU
Manufacturer's Certificate
26/23
Tire sizes
Wheel sizes
Snow
chains
FA: 9J x 20, RO 43
RA: 11.5J x 21, RO 46
RA only
Winter
20/21– inch
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) (ET = Einpresstiefe)in mm, part number (without color code marking FFF) and
Porsche logo
20"-wheel "GT3"
FA: 9.5J x 20, RO 46 (summer (UHP))
Part No. 9GT.601.025.Q_FFF
FA: 9J x 20, RO 43 (winter)
Part No. 9GT.601.025.B_FFF
GT3
21"-wheel "GT3"
RA: 12J x 21, RO 45 (summer (UHP))
Part No. 9GT.601.025.R_FFF
RA: 11.5J x 21, RO 46 (winter)
Part No. 9GT.601.025.C_FFF
GT3
Oct 10, 2023
Page 2 of 9
AfterSales
911 (992)
Manufacturer's Certificate
26/23
ENU
4400
4
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.
Wheel
Mounting:
Summer (UHP):
using central wheel lock:
Tightening torque 600 Nm (444 ftlb.)
Tire make and type /
Label value (Link to EU database)
Tire size
911 GT3, 911 GT3 Touring package
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
FA: https://eprel.ec.europa.eu/qr/530187
FA: 255/35 ZR 20 (97Y) XL
RA: 315/30 ZR 21 (105Y) XL
RA: https://eprel.ec.europa.eu/qr/530188
Goodyear Eagle F1 Super Sport RS N0
FA: https://eprel.ec.europa.eu/qr/1079540
RA: https://eprel.ec.europa.eu/qr/1100069
Michelin Pilot Sport Cup 2 R N0
FA: https://eprel.ec.europa.eu/qr/409102
RA: https://eprel.ec.europa.eu/qr/408957
FA: 255/35 ZR 20 (93Y)
RA: 315/30 ZR 21 (105Y) XL
Pirelli P-Zero Corsa N0
FA: https://eprel.ec.europa.eu/qr/596215
RA: https://eprel.ec.europa.eu/qr/596216
AfterSales
Oct 10, 2023
Page 3 of 9
4
911 (992)
4400
ENU
Manufacturer's Certificate
26/23
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
FA: 275/35 ZR20 (102Y) XL
RA: 335/30 ZR21 (109Y) XL
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
Winter Tires:
Tire make and type /
Label value (Link to EU database)
Tire size
911 GT3, 911 GT3 Touring package, 911 GT3 RS
Michelin Pilot Alpin 5 NA5
FA: https://eprel.ec.europa.eu/qr/411084
FA: 245/35 R 20 95V XL
RA: 305/30 R 21 104V XL
RA: https://eprel.ec.europa.eu/qr/410097
Goodyear Ultragrip Performance Gen-1 NA0
FA: https://eprel.ec.europa.eu/qr/529616
RA: https://eprel.ec.europa.eu/qr/529627
Arrow with inscription “Rotation”
= directional mounting
"Inside/Outside" inscription
= mounting on specified side only
Arrow with both inscriptions “Rotation” and
“Inside/Outside”
= 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.
Oct 10, 2023
Page 4 of 9
AfterSales
911 (992)
Manufacturer's Certificate
26/23
ENU
4400
4
Information
"N..." = Specification code of the tire, e.g. "NA0", "NA1", "NA2" ... The complete “N ...” code of the
relevant tire makes must be shown on the tire sidewall near the 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.
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
(NA0, NA1, NA2, etc.) on a vehicle.
Tire pressure:
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.
WARNING
Driving at high speed with low tire pressure can cause irreparable damage to tires.
Set Comfort air pressure for tires only on vehicles with Tire Pressure Monitoring System (TPMS) and
“Comfort” selected in the "Tire pressure" main menu in the multi-function display.
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.
AfterSales
Oct 10, 2023
Page 5 of 9
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