2005 PORSCHE CAYENNE TURBO tire size

Practical Tips, Minor Repairs
281
Example of InscriptionInscription on radial tireATire size
Example: P 255/55R18 109 Y
–P - The tire is designed for Passenger vehicle.
There is not on every tire this information.
–255 - Indication of tire width in mm
–55- Indication of tire height to tire width ratio
in percent
–R- Belt type code letter for radial
–18 - Indication of rim diameter in inches–109 - Load capacity coefficient
–Y - Speed code letter
B TIN (Tire Identification Number)
Example: DOT xx xx xxx 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 three-digit code means tire type code.
– fourth four-digit code means Date of manufac-
ture.
If, for example, the last four numbers read
1204, the tire was produced in the 12th 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.
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 Term of tubeless or tube tire
Identification for tubeless tires.
GRadial
The identification indicates if the tire has radial
structure.

Practical Tips, Minor Repairs
299
Spare wheel
Warning!
Risk of accident. The wheel and tire size and
the tire quality of the spare wheel and normal
wheel may differ.
If a spare wheel that differs from the normal
tires is used, this may impair the driving be-
havior.
fThe spare wheel must be used only over short
distances in cases of emergency.
For safety reasons, replace the tires before
the wear indicators appear (webs in the tire
grooves, 1.6 mm high).
fNever deactivate the Porsche Stability
Management (PSM) system.
fIf the tire on the spare wheel is older than
4 years, the spare wheel should be used only
in the event of a flat.
fAvoid hard acceleration and high cornering
speeds.
The maximum permitted speed is 50 mph
(80 km/h) if the mounted spare wheel differs
from the other three wheels on the car. This
maximum speed must not be exceeded be-
cause of altered driving characteristics and for
reasons of wear.
fDo not use a spare wheel from a different vehi-
cle type.
fDo not mount the spare wheel from your car on a different vehicle.Removing spare wheel
Warning!
Danger of injury if the spare wheel is re-
moved improperly.
fRemove the spare wheel only when the spare
wheel bracket is locked.
fRemove the spare wheel from the spare wheel
bracket with care. The wheel is very heavy (ap-prox. 77 lbs. or 35 kg).
1. Unscrew all five wheel bolts.
2. Remove the top wheel bolt.
Remove assembly aid from the tool kit and
screw in instead of the wheel bolt.
Remove the remaining wheel bolts.
Fitting spare wheel
fInsert wheel bolts and tighten by hand. Re-
move assembly aid and screw in remaining
wheel bolt.
Initially tighten bolts in diagonally opposite se-
quence so that the wheel is centerd.
fPlease observe the chapter “TIRE PRESSU-
RES, COLD” on Page 350.
fAfter mounting the wheel, tighten all five wheel
bolts to 111 ftlb. (150 Nm).

348
Vehicle Identification, Technical Data
Tires, Rims, Tracks
Tires Wheel Rim offset Track
front/rear front/rear front rear
Summer tires
255/55 R 18 109 Y XL
1)
8 J x 18
57 mm
64.8 in. (1647 mm)
65.4 in. (1662 mm)
275/45 R 19 108 Y XL 9 J x 19 60 mm 64.6 in. (1641 mm) 65.2 in. (1656 mm)
275/40 R 20 106 Y XL
9 J x 20
60 mm
64.6 in. (1641 mm)
65.2 in. (1656 mm)
275/40 R 20 106 Y XL 9 J x 19/10 J x 20 60 mm / 55 mm 64.6 in. (1641 mm) 65.6 in. (1666 mm)
Winter tires
235/60 R 18 107 H XL
1)
8 J x 18
57 mm
64.8 in. (1647 mm)
64.8 in. (1662 mm)
255/55 R18 109 V XL
1)
8 J x 18 57 mm 64.8 in. (1647 mm) 65.4 in. (1662 mm)
255/50 R19 107 V XL
1)
9 J x 19
60 mm
64.6 in. (1641 mm)
65.2 in. (1656 mm)
All-Season
255/55 R 18 109 V XL
1)
8 J x 18
57 mm
64.8 in. (1647 mm)
65.4 in. (1662 mm)
All-Terrain
235/60 R 18 107 T XL
1)
8 J x 18
57 mm
64.8 in. (1647 mm)
65.4 in. (1662 mm)
The load capacity coefficient (e.g. “106”) and maximum speed code letter (e.g. “T”) for permitted top speed are
minimum requirements.
When fitting new tires or changing tires: Please observe the chapter “TIRES/WHEELS” on Page 269.
Tire and rim sizes
The authorization of tire and rim sizes is determined on the basis of extensive testing.
Your authorized Porsche dealer will be pleased to advise you about the current authorization status.
Refitting with sizes not authorized by Porsche may have a dangerous effect on driving stability.

350
Vehicle Identification, Technical Data
Tire Pressures, ColdThese tire filling pressures apply only to the tire makes and types approved by Porsche.
Please observe the chapter “TIRES/WHEELS” on Page 269.Partially loaded
Tire size Front axle Rear axle
235/60 R 18
38 psi (2.6 bar) 43 psi (2.9 bar) 255/55 R 18
275/45 R 19
275/40 R 20
195/75 - 18 collapsible spare wheel 51 psi (3.5 bar) 51 psi (3.5 bar)
Fully loaded
Tire size Front axle Rear axle
235/60 R 18
38 psi (2.6 bar) 50 psi (3.4 bar) 255/55 R 18
275/45 R 19
275/40 R 20
195/75 - 18 collapsible spare wheel 51 psi (3.5 bar) 51 psi (3.5 bar)

366
Index Temperature
Sensor ...................................... 127
,131
Setting ...................................... 128,133
Temporary change-down.............................. 200
Terrain level................................................ 228
Te s t s t a n d s
Measurement ..................................... 219
Theft protection ............................................ 16
Through-load bag ........................................ 187
Securing load ..................................... 188
Through-load facility .................................... 187
Tie-down
Belts ......................................... 182,193
Equipment .......................................... 193
Rings ........................................ 182,185
Tiptronic ...................................... 15
,51,198
Rocker switches ................. 51
,200
,201
Tire
Care .................................................. 275
Life .................................................... 274
Traction ............................................. 272
Wear .................................................. 274
Tire and rim sizes ....................................... 348
Tire pressure ....................................... 85,194
Load .................................................. 193
Plate .................................................. 345
Reducing ................................... 296,298
Specifications ....................................... 98
Tables................................................ 350
Warning light .......... 68
,70,87,97,108
Warning message ................................. 93
Tire pressure monitoring system .................... 85
Monitoring ............................................ 92
System learning process ....................... 87Tire sealant ........................... 90
,91,96,288
Warning light....................................... 108
Tires .......................................................... 269
Changing ............................................ 170
Damage ............................................. 275
Flat .................................................... 287
Inflating ..................................... 295,297
Inscription .......................................... 281
Replacing ........................................... 276
Sidewall.............................................. 281
Size ................................................... 281
Tracks ............................................... 348
Type .................................................... 89
Valves ................................................ 276
Tool kit ....................................................... 269
Screewdriver ...................................... 283
Tools.......................................................... 269
Screwdriver ........................................ 283
Towing .............................................. 205,340
Capacity ............................................. 191
Hook .................................................. 340
Tow-starting ................................................ 205
Tracks........................................................ 348
Traction...................................................... 222
Management....................................... 212
Traction systems......................................... 211
Trailer
Coupling ............................................. 190
Hitch .................................................. 190
Hitching.............................................. 190
Unhitching .......................................... 190
Transmission .............................................. 347
Transport ............................................ 28,230Turn signal light...........................................334
Indicator light .................................68
,70
Rear ...................................................336
Switch ................................................117
Turn signal pilot light
Indicator light .................................68,70
Turn signal/high beam/
headlight flasher stalk..................................117
Tyre pressure
Warning message..................................93
UUltrasonic measurement ..............................160
Ultrasound sensors, ParkAssist ....................158
Ultrasound sources .....................................160
Undercoating ..............................................261
Unlocking, keyless ........................................24
Immobilizer ...........................................25
Uphill driving ...............................................222
Traction..............................................222VVehicle
Battery .............................170
,312
,325
Care...................................................256
Data bank ...........................................344
Identification number ...........................344
Keys ...........................................17,326
Laying up............................................265
Lowering ............................................230
Putting into operation ..........................313
Raising ......................................229,230
Recovery ............................................341