2005 PORSCHE 911 CARRERA width

210
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.

220
Practical Tips, Emergency Service
Example of InscriptionInscription on radial tireATire size
Example: P 295/30 ZR 19 100 Y
–P - The tire is designed for Passenger vehicle.
This information is not included on all tires.
–295 - Indication of tire width in mm
–30 - 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
–19 - Indication of rim diameter in inches
–100 - Load capacity coefficient
–Y - Speed code letter
–XL (Extra Load) - Tire with increased load rat-
ing
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.

Practical Tips, Emergency Service
221
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

272
Technical Data
DimensionsLength 175.6 in./4461 mm
Width 71.2 in./1808 mm
Height 51.6 in./1310 mm
Wheelbase 92.6 in./2350 mm
Ground clearance 4.2 in./106 mm
at maximum gross weight 3.4 in./86 mm
Turning circle 35.8 ft./10.9 m
Vehicles with PASM
Height 51.2 in./1300 mm
Ground clearance 3.8 in./96 mm
at maximum gross weight 3 in./76 mm

Index
281
PPaint
Care .................................................. 198
Data................................................... 263
ParkAssistant ............................................... 53
Parking ...................................................... 150
Parking aids ...........................................53
, 55
Parking brake ............................................... 58
Warning light ........................................ 59
Parking light .......................................113, 114
Particle filter............................................... 195
Passenger compartment monitoring............... 26
Plastic parts ............................................... 204
Platform lift ................................................ 224
Porsche Active Suspension Management
(PASM) ......................................................... 68
Porsche Ceramic Composite Brake (PCCB) ....... 8
Porsche Communication Management
(PCM)......................................................... 139
Porsche Stability Management (PSM).............. 65
Information light .................................... 67
Power measurements ................................. 178
Power steering fluid level.....................194, 268
Power windows.............................. 21
, 28, 156
Practical tips .............................................. 208
RRadiator fan .........................................75
, 180
Radio reception .......................................... 140
Rain sensor ................................................ 115
Range on remaining fuel ........................91, 104
Reading light ........................................69, 256
Rear fog light ............................................. 113Rear lid ......................................................130
Rear seat backrests ......................................39
Rear spoiler ..................................................56
Rear view mirrors................................... 30
, 32
Rear window defogger...................................33
Rear window wiper ......................................116
Recycling .......................................................7
Reduced driving program, Tiptronic ..............150
Relays ........................................................232
Release button............................................145
Remote control .............................................20
Replacement key ..........................................19
Replacing bulbs ..........................................244
Replacing wiper blades................................196
Rims
Diameter ............................................221
Rim width ...........................................221
Rollover Protection System ............................52
Roof Transport System ....................... 175, 269
Running in ....................................................16
SSafety belts ......................................... 42
, 206
Height adjustment .................................44
Tensioner .............................................42
Warning light.........................................43
Safety compliance sticker............................262
Sealing set .................................................226
Seals .........................................................204
Seat
Adjustment ...........................................34
Heating ................................................38
Memory................................................36
Selector lever .............................................145Selector lever position indicator ............ 85
, 146
Shifting gear .............................................. 144
Side marker light................................ 113, 253
Side vents ................................................. 123
Sliding roof ................................................ 152
Snow chains .............................................. 219
Snow tires ................................................. 218
Socket ...................................................... 232
Spare key .............................................. 19, 20
Speed code letter ...................................... 220
Speed control .............................. 80
, 118
, 119
Speed limit .......................................... 92, 220
Speedometer ............................................... 82
Spoiler ........................................................ 56
Sport Chrono Package
CHRONO stopwatch.............................. 96
Sport mode ......................................... 64
Sport mode ........................................... 64, 68
Sports seat ................................................. 34
Sport-type running gear .............................. 272
Stability management system ........................ 65
Starting ....................................................... 73
Starting engine ............................................ 74
Steering lock ............................................... 72
Steering wheel
Adjustment .......................................... 39
Function keys ....................................... 40
Lock.................................................... 73
Rocker switches ................................. 145
Stopping engine ........................................... 75
Stopwatch ................................................... 96
Storage options ......................................... 128
Storing your Porsche.................................. 206
Sun visors ................................................... 41
Switching passenger airbag off/on ................ 49