2006 PORSCHE CAYMAN wheel size

Controls, Instruments
55
Clutch Pedal The clutch pedal must be depressed fully be-
fore the starter will engage.
Warning!
Risk of an accident.
fAlways check the movement of the clutch ped-
al before driving and make sure that it is not
obstructed by a floor mat or any other object.
fSecure the floor mat to prevent it from sliding
into positions that could interfere with the safe
operation of your vehicle.
Your Porsche dealer will be glad to offer you
nonskid floor mats of the correct size.
To avoid damage to the clutch and transmis-
sion:
fAlways depress the clutch pedal fully when
changing gears.
fDo not hold the car on a steep grade with the clutch pedal partially depressed.
Should the free travel of the clutch pedal suddenly
become larger, it could mean a malfunction of the
clutch.
fSee your Porsche dealer for correction.
Parking Brake Parking brake force is mechanically transferred to
the rear wheels by means of cables.
fUse the parking brake only after the vehicle
has come to a full stop.
Setting the parking brake fPull the lever all the way up (see arrow).
With the ignition on, the parking brake warning
lights in the instrument panel and on-board
computer will come on if the lever is even
slightly raised. A firm pull upward is required to
properly engage the parking brake.
If the brake is not fully set, the vehicle may roll
without control.
fMove the selector lever to “P” (Tiptronic) or
move the gearshift lever to reverse or first
gear (Manual transmission).
fBefore exiting the vehicle, make sure that the
parking brake is fully set and the vehicle is not
moving at all.
Danger!
Risk of serious personal injury or death. A
partially engaged parking brake may allow
the vehicle to roll, causing serious personal
injury or death to any person in its path.
fEngage the parking brake fully.Releasing the parking brake fPull the lever slightly up as you depress the re-
lease button, and then push the lever all the
way down.

60
Controls, Instruments
Operation of the ABS system A wheel speed sensor is mounted to each of the
four wheels. If wheel lock-up of either of the front
wheels or the rear wheels is sensed during brak-
ing, the brake pressure is adjusted automatically
until the wheel no longer slips. The brake pressure
is regulated for each front wheel individually and
for both of the rear wheels together.
On a road surface which is slippery on only one
side, the rear wheel which is braking on the slip-
pery surface determines the brake pressure which
will be applied equally to both rear wheels. This en-
sures that directional stability is maintained. How-
ever, if braking forces approach the wheel lock-up
point for all wheels (panic braking) the ABS system
will intervene to provide a rapid rhythmic braking.
The proper operation of ABS is perceived by the
driver as a pulsating brake pedal in conjunction
with audible noise and perhaps some vibration.
fIf you experience these sensations while driv-
ing or a road surface with questionable trac-
tion, reduce vehicle speed appropriate for the
prevailing road conditions.
The functional readiness of all the main electrical
components of the ABS is checked by an electron-
ic monitoring system both before and while you
drive. When the ignition is switched on the ABS warning
light will light up while the system is electronically
interrogated and goes out when the engine is
started if the check is not yet complete.
If the ABS warning lamp fails to go out, this indi-
cates that ABS has been deactivated due to a
fault. If the warning lights in the instrument panel
and on-board computer light up while you are driv-
ing, this indicates that a fault has occurred. In both
cases, normal braking, as in vehicles without ABS,
is still retained.
The ABS system should, however, be examined at
an authorized Porsche dealer immediately to pre-
vent the occurrence of further faults.
fIf the ABS system becomes inoperative, take
your vehicle to your authorized Porsche dealer
immediately.
Warning!
The control unit of the ABS brake system is
set for standard tire size. If non-standard
tires are installed, the control unit may mis-
interpret the speed of the vehicle, because of
the variant data it receives from the sensors
on the axles.
fUse only tire makes and types tested by Porsche.
Warning light USA
Warning light Canada

Controls, Instruments
103
TPC Tire pressure monitoringfPlease observe the chapter “TIRES, RIMS,
TRACKS” on Page 268.
The tire pressure monitoring continuously
monitors tire pressure and tire temperature on all
four wheels and warns the driver when the tire
pressure is too low.
The display as well as the settings for the tire
pressure monitoring take place on the on-board
computer.
However, you must still adjust the tire pressure on
the wheel.
fThe driver is responsible for filling the tires
correctly and making the correct settings on
the on-board computer.
The tire pressure monitoring offers the following
functions:
– Display of the actual tire pressure while the
vehicle is in motion
– Display of the deviation from the required
pressure (refilling pressure)
– Display of currently set tire size and type
– Tire pressure warnings in two stages
Safety notes!
Despite the advantages offered by the tire
pressure monitoring, it is still the driver’s
responsibility to update the corresponding
settings in the on-board computer and
maintain the pressure in the tires. Low tire
pressure reduces the road safety of the
vehicle and destroys the tire and wheel.
fWhen a flat tire has been displayed, immedi-
ately stop in a suitable place and check the
tires for damage. If necessary, remedy the
damage with a tire sealant.
fDo not by any means continue to drive with
defective tires.
fSealing the tire with tire sealant is only an
emergency repair, so you can drive to the next
authorized Porsche dealer. The maximum per-
mitted speed is 50 mph (80 km/h).
fDo not drive with tires whose tire pressure
drops again in a short period of time. In cases
of doubt, have tires checked by an authorized
Porsche dealer.
fDefective tires must be immediately replaced
by an authorized Porsche dealer.
Tire repairs are not permissible under any
circumstances.fIf the tire pressure monitoring is defective (e.g.
defective wheel transmitter), contact an
authorized Porsche dealer immediately and
have the damage repaired.
The tire pressure will not be monitored by a
defective tire pressure monitoring.
fTires lose air over time without a tire defect
being present. A tire pressure warning will then
appear in the on-board computer display.
Correct the tire pressure at the next oppor-
tunity.
fThe tire pressure monitoring gives a warning
about tire damage due to natural pressure loss
as well as about a gradual loss of pressure due
to foreign objects.
The tire pressure monitoring cannot warn you
about tire damage that occurs suddenly (e.g.
flat tire due to abrupt external effects).

106
Controls, Instruments fSelect “Continue” and push the operating lever
forward.
fSelect the appropriate tire size (18 or 19 inch)
and push operating lever forwards.
A display for confirming the selected tire size
appears.
Note
This menu is only displayed when different tire
sizes are approved.fSelect “Continue” and push the operating lever
forward.
Setting of the tire characteristics has only been
successfully completed when the message
“Process complete” is displayed by the on-board
computer.
fSelect arrow (Back) and push the operating
lever forward. The display returns to the Tire
pressure menu.
The on-board computer additionally displays
the message “System learning”.Note
The message “Process aborted” appears if the
setting process is interrupted. All entries made up
to this point are lost, and the original settings
remain in effect.
Only if the message “Process complete” appears
after the settings have been made will the tire
pressure monitoring re-learn the wheels.
fPlease observe the chapter “SYSTEM
LEARNING” on Page 108.
Before fitting tires with sizes which are not stored
in the on-board computer, the missing information
should be supplemented in the on-board
computer.
fConsult a qualified specialist garage. We
recommend that you use a Porsche partner for
this work since these are staffed with trained
personnel and have the necessary parts and
tools.
fUse only tires approved by Porsche.
The available items in the Tire pressure menu
depend on the equipment of your vehicle. For this
reason it is possible that some of the items shown
here are not available on your on-board
computer’s display.

212
Practical Tips, Emergency Service
Example of a tire pressure plate ATire pressure plateDepending on when your vehicle was manufac-
tured, the tire pressure plate in the left door aper-
ture will contain different data.
Information on the tire pressure plate A
A Seating capacity
Maximum number of vehicle occupants, includ-
ing the driver.B Vehicle load limit
Is the maximum total weight limit specified of
the load (passengers and cargo) for the vehi-
cle. This is the maximum weight of passengers
and cargo that can be loaded into the vehicle.
If a trailer is being towed, the trailer tongue
weight must be included as part of the cargo
load.
Please observe the chapter “LOADING INFOR-
MATION” on Page 221.
C Tire size for the front axle
Check with your authorized Porsche dealer
about the current release status.
D Recommended tire pressure for the front axle
These values are for cold tires (68°F/20 °C).
E Tire size for the rear axle
Check with your authorized Porsche dealer
about the current release status.
F Recommended tire pressure for the rear axle
These values are for cold tires (68°F/20 °C).
G In vehicles with collapsible spare wheel:
Size and tire pressure of the spare wheel.

268
Vehicle Identification, Technical Data
Tires, Rims, Tracks
Danger!
Installation of sizes not authorized by
Porsche may have a dangerous effect on
the driving stability and could result in
severe personal injury or death.
fBefore mounting new tires, check with yourPorsche dealer about the current release status. Tire Rim Rim offset Track
Summer tires
front 235/40 ZR 18 91Y 8 J x 18 H2
57 mm 58.5 in./1486 mm
rear 265/40 ZR 18 101Y XL9 J x 18 H2
43 mm 60.2 in./1528 mm
or front 235/35 ZR 19 87Y8 J x 19 H2
57 mm 58.5 in./1486 mm
rear 265/35 ZR 19 94Y9.5 J x 19 H2
46 mm 60.0 in./1522 mm
Snow tiresfront 235/40 R 18 91V M+S8 J x 18 H2
57 mm 58.5 in./1486 mm
rear * 255/40 R 18 95V M+S9 J x 18 H2
43 mm 60.2 in./1528 mm
The load capacity coefficient (e.g. “91”) and maximum speed code letter (e.g. “V”) are minimum requirements.
Please observe the chapter “TIRES/WHEELS” on Page 207.
Tire and rim sizes
Extensive tests are performed before specific tires and wheels are approved by Porsche. Your Porsche dealer has information
about approved tires and wheels and is happy to assist you. If aftermarket tires and/or wheels are installed which are not
approved by Porsche, the vehicle’s roadability and handling characteristics might be impaired. Since Porsche has no data on
such combinations, Porsche cannot stand behind the safety or durability of these aftermarket combinations.
* Snow chains Can be mounted only on the rear wheels; maximum speed 30 mph/50 km/h.
Use only Porsche authorized fine-link cross-type or edge chains.
Snow chain clearance can be guaranteed only with the tire + rim combination marked.

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

280UUndercoating ............................. 190
, 199
, 200
VValves ........................................................ 215
Vanity mirror................................................. 39
Vehicle
Care .................................................. 195
Data bank........................................... 264
Identifikation number ........................... 264
Laying up the car................................ 237
Putting into operation .......................... 238
Washing ............................................. 195
Ventilation .................................................. 133
Vents .................................................130
, 133
Viscosity, engine oil.................................... 180
WWarning messages ..................................... 114
Washer fluid .......................................192
, 271
Washer lever .............................................. 125
Washing ..................................................... 195
Weights...................................................... 272
Welcome Home Function............................. 123
Wheel ....................................... 201
, 207
, 268
Bolts ............................................17, 227
Changing............................................ 228
Checking pressure..........................5, 227
Inscription .......................................... 219
Loading information............................ 221
Pressure plate .................................... 265
Sidewall ............................................. 219Size ................................................... 219
Tire pressure ................................. 5
, 210
Tire sealant ........................................ 225
Windows ....................................... 23
, 26, 199
Washer nozzles................................... 125
Washer system .......................... 192, 271
Windshield wipers .............................. 125, 173
Replacing ........................................... 173
Winter driving
Battery ............................................... 236
Jump lead starting.............................. 242
Winter operation
Coolant .............................................. 176
Seals ................................................. 200
Snow chains ....................................... 218
Tires .................................................. 217
Washer fluid........................................ 192
Wiper blades....................................... 173