Porsche 911 Carrera - Manual (Page 269)

Tires/Wheels
General information
The original equipment tires and wheel rims on
your Porsche comply with all applicable Federal
Motor Vehicle Safety Standards.
For your safety remember the following:
– Wheel rims and wheel bolts are matched to fit
your Porsche.
– If you intend to use other than original equip-
ment wheels, be sure that they conform to
Porsche specifications for your model. Only
tires with the same make and with the same
specification code (e.g. “N0”, “N1”...) can be
mounted.
– The use of wheel rims and wheel bolts that
do not meet specifications of the original
factory installed equipment will affect the safe
operation of your vehicle.
– Before you plan on exchanging wheels, or
snow tires already mounted on the wheel rims,
consult your authorized Porsche dealer. Your
dealer has the technical information necessary
to advise you which wheel rims and wheel
bolts are compatible with the original factory
installations.
Danger!
Risk of loss of control and serious personal
injury or death.
If while driving, your vehicle experiences a
sudden vibration or ride disturbance, and/or
you suspect that possible damage to your
tires or vehicle has occurred, you should
immediately reduce your speed without
excessive use of the brakes.
Stop the vehicle as soon as possible, and
inspect the tires. If you cannot determine the
cause for the disturbance, have your vehicle
towed to the nearest Porsche or tire dealer to
have your vehicle or tire(s) inspected.
Continuing to operate the vehicle without
correction could result in a loss of control and
serious personal injury.
Example
Uniform Tire Quality Grading
Quality grades can be found where applicable
on the tire sidewall between tread shoulder and
maximum section width.
All passenger car tires must conform to Federal
Safety Requirements in addition to these grades.
Treadwear
The treadwear grade is a comparative rating based
on the wear rate of the tire when tested under
controlled conditions on a specific government
test course. For example, a tire graded 150 would
Practical Tips, Emergency Service
267