Porsche Cayman Owner's Manual page 249

– fourth four-digit code means date of manu-
facture. If, for example, the last four numbers
read 0204, the tire was produced in the 2nd
week of 2004.
C Tire ply composition and material
The number of layers in the tread and sidewalls and
their material composition.
D Maximum permissible ination pressure
The maximum permissible cold inflation pressure
to which a tire can be inflated.
Do not exceed the permissible inflation
pressure.
E Maximum Load rating
The maximum load in kilograms and pounds can be
carried by the tire. If you replace tires always use a
tire that has the same maximum load rating as the
factory installed tire.
F Radial
The identification indicates if the tire has radial
structure.
G Term of tubeless or tube tire
Identification for tubeless tires.
Speed code letter
The speed code letter indicates the maximum
permissible speed for the tire. This code letter is
shown on the tire sidewall.
T = up to 118 mph (190 km/h)
H = up to 131 mph (210 km/h)
V = up to 150 mph (240 km/h)
W = up to 167 mph (270 km/h)
Y = up to 186 mph (300 km/h)
Tip on driving
Tires with a maximum speed rating that is lower
than the specified maximum vehicle speed may be
mounted only if they bear an M+S identification on
the tire sidewall.
Please note that in addition to the winter tires,
all-season and all-terrain tires are also subject
to speed limits and bear this identification.
Inscription on light alloy wheels
Maintenance note
Protect the valve inserts against soiling with
valve caps. Use only plastic valve caps. Soiled
valve inserts can cause a gradual loss of air.
A - Rim width in inches
B
- Rim-ange contour code letter
C - Symbol for drop-center rim
D
- Rim diameter in inches
E - Double hump
F
- Rim offset in mm
Note on operation
The rim width in inches A and the rim offset F
are visible from the outside. This information
can be found near the tire valve.
Practical Tips, Emergency Service
247