Wheels/Tires - Approved Winter Tires/Wheels/Snow Chains
Approved Winter Tires, Wheels and Snow ChainsINFORMATION This Technical Information replaces Technical Information No. 25/08 dated August 28, 2008.
Vehicle Type:
911GT3 (997J/911 GT3RS (997)
Model Year:
As of 2007 up to 2008
Situation:
Approved winter tire makes and types - November 2008.
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:
INFORMATION
- N... = Specification code of the tire, e.g. "NO", "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 = mounting on specified side only.
Arrow with both inscriptions "Rotation" and "Inside/Outside" = directional mounting on specified side only.
- 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 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.
Sizes:
WARNING
Wheel electronics units not detected, incorrectly secured or loose on vehicles without Tire Pressure Monitoring (TPM)
- Risk of damage to wheels and/or tires
- Uncontrollable vehicle handling
- Do not mount wheels with wheel electronics units on vehicles without TPM.
Wheels
Overview of Porsche wheels for winter tires
Identification on the inside/outside of the wheel disc:
Wheel size, rim offset (RO) in mm, Part No. and Porsche logo
INFORMATION The 8Jx19 H2 wheel, RO 57, part no. 997.362.156.00 can not be installed on vehicles with PCCB.
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:
Tightening torque 130 Nm (96 ftlb.)
WARNING
Incorrectly installed snow chains
- Uncontrollable vehicle handling
- Do not exceed the maximum speed of Speed 50 km/h (30 mph).
- Observe installation instructions from the chain manufacturer.
Snow Chains
INFORMATION Sufficient snow-chain clearance is only possible by first removing any spacers that are installed.
Wheel Storage:
Tires must be stored in a cool, dry and dark room with adequate ventilation. Tires must never come into contact with fuel, oil, grease or chemicals.
Complete wheels can be stacked for storage; we recommend that you increase the tire pressure by approx. 0.4bar (6psi).
Optimum conditions for storage of the complete wheels are provided by the Original Porsche storage trolley, Part No. 000.044.000.38.
If the tires are not mounted on wheels, it is best to store them in a vertical position. We recommend that you turn tires stored in this position every two weeks in order to prevent flat spots. Tires that are stacked in a horizontal position will become severely deformed and cannot be seated properly in the rim flange when they are mounted.
Disclaimer