2006 PORSCHE CAYMAN width

208
Practical Tips, Emergency Service
Uniform Tire Quality Grading Quality grades can be found where applicable on
the tire sidewall between tread shoulder and max-
imum section width.
Example 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 un-
der controlled conditions on a specific govern-
ment test course.
For example, a tire graded 150 would wear one
and a half (1-1/2) times as well on the government
course as a tire graded 100.
The relative performance of tires depends upon
the actual conditions of their use, however, and
may depart significantly from the norm due to var-
iations in driving habits, service practices and dif-
ferences in road characteristics and climate.

Practical Tips, Emergency Service
219
Example of InscriptionInscription on radial tireATire size
Example: P 265/40 ZR 18 101 Y
–P - The tire is designed for Passenger vehicle.
This information is not included on all tires.
–265 - Indication of tire width in mm
–40 - Indication of tire height to tire width ratio
in percent–ZR - code letter for radial tires for speeds
above 150 mph / 240 km/h
There are currently no standards concerning
tire strength at speeds above 150 mph (240
km/h).
–R - Belt type code letter for radial
–18 - Indication of rim diameter in inches
–101 - Load capacity coefficient
–Y - Speed code letter
–XL (Extra Load) - Tire with increased load
rating
B TIN (Tire Identification Number)
Example: DOT xx xx xxxx xxxx
–DOT
The DOT symbol indicates that the tires com-
ply with the requirements of the US Depart-
ment of Transportation and provides informa-
tion about:
– first two-digit code means manufacture’s iden-
tification mark.
– second two-digit code means tire size.
– third four-digit code means tire type code.
– fourth four-digit code means date of manufac-
ture.
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 inflation pressure
The maximum permissible cold inflation pressure
to which a tire can be inflated.
fDo not exceed the permissible inflation pres-
sure.

220
Practical Tips, Emergency Service 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.
FRadial
The identification indicates if the tire has radial
structure.
G Term of tubeless or tube tire
Identification for tubeless tires.
Speed code letterThe speed code letter indicates the maximum per-
missible 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.
fPlease 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 wheelsMaintenance note
fProtect the valve inserts against soiling with
valve caps.
Use only plastic valve caps.
Soiled valve inserts can cause a gradual loss
of air.
Note on operation
fThe rim width in inches A and the rim offset F
are visible from the outside. This information
can be found near the tire valve.
A-Rim width in inches
B- Rim-flange contour code letter
C- Symbol for drop-center rim
D- Rim diameter in inches
E-Double hump
F- Rim offset in mm

Vehicle Identification, Technical Data
273
Dimensions * At maximum gross weight.PAS M
Length 172.1 in./4372 mm
Width 70.9 in./1801 mm
Width
(with door mirrors) 76.3 in./1937 mm
Height 51.4 in./1305 mm 51.0 in./1296 mm
Wheelbase 95.1 in./2415 mm
Ground clearance* 4.1 in./104 mm 3.9 in./100 mm
Turning circle 36.4 ft./11.1 m

Index
279
Rear fog light .....................................122
, 256
Rear lid ...................................................... 150
Rear view mirrors ......................................... 29
Rear window defogger.................................. 31
Rear wiper ................................................. 127
Replacing ........................................... 175
Relays ........................................................ 232
Release button ........................................... 165
Remote control ............................................. 18
Replacement key .......................................... 17
Replacing bulbs .......................................... 245
Replacing wiper blades................................ 173
Retractable rear spoiler ................................. 66
Rims
Diameter ............................................ 220
Rim width ........................................... 220
Roof load ................................................... 162
Roof Transport System........................162, 272
Running in .................................................... 14
SSafety belts ..........................................40
, 202
Warning light ........................................ 41
Safety compliance sticker ........................... 264
Sealing set ................................................. 225
Seals, care of ............................................. 200
Seat ............................................................ 32
Adjustment ........................................... 32
Heating ................................................ 36
Memory ............................................... 34
Selector lever ............................................. 165
Selector lever position indicator .............87, 167
Service flap ................................................ 151
Shifting gear............................................... 164Shiftlock .....................................................165
Side lights ..................................................256
Side marker light ............................... 122
, 253
Side storage compartments ........................144
Side vents ..................................................136
Snow chains .............................. 218
, 268
, 269
Snow tires ......................................... 217, 268
Sockets .....................................................140
Spacers .....................................................230
Spare key .....................................................17
Spare wheel ...............................................269
Speed code letter .......................................219
Speed control .............................. 82
, 129
, 130
Speed limit .......................................... 94, 219
Speedometer................................................84
Spoiler .........................................................66
Sport mode ..................................... 61
, 64, 65
Sports seat ..................................................32
Stability management system (PSM) ...............62
Starting ................................................. 74, 75
Starting and stopping the engine ....................74
Steering wheel
Adjustment ...........................................37
Buttons ................................................38
Lock ................................. 74
, 75, 76, 77
Rocker switches..................................165
Toggle switches ..................................165
Stopwatch ....................................................98
Storage options ..........................................141
Storing your Porsche..................................203
Sun visors ....................................................39
TTachometer ..................................................85Tail light ..................................................... 255
Tank .................................................. 186
, 187
Cap ................................................... 187
Ventilation system.............................. 191
Telephone .................................................. 157
Temperature setting........................... 130, 133
Temperature, outside indicator ...................... 89
Test stand, measurements ............................ 64
Theft protection ........................................... 16
Tie-down rings ........................................... 151
Tiptronic .................................................... 165
Indicator .............................................. 87
Tire filling compressor ................................ 149
Tire pressure monitoring ............................. 103
Tires ........................................... 14
, 207
, 268
Checking pressure............................. 227
Inscription .......................................... 219
Loading information ............................ 221
Pressure................................ 5
, 210
, 269
Pressure plate.................................... 265
Sealant .............................................. 225
Sidewall ............................................. 219
Size .................................................. 219
Tires and tire care ...................................... 207
Tools ......................................................... 149
Towing .............................................. 260, 261
TPC Tire pressure monitoring ...................... 103
Track ........................................................ 268
Transmission ............................. 163
, 164
, 267
Fluid .......................................... 194, 271
Trunk entrapment ....................................... 146
Turn signals ......................................... 85, 124