2006 PORSCHE BOXSTER wheel size

62
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 bra-
king, 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 si-
de, the rear wheel which is braking on the slippery
surface determines the brake pressure which will
be applied equally to both rear wheels. This ensu-
res that directional stability is maintained. Howe-
ver, if braking forces approach the wheel lock-up
point for all wheels (panic braking) the ABS system
will intervene to provide a rapid rythmic 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 dri-
ving 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 electro-
nic 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 star-
ted if the check is not yet complete.
If the ABS warning lamp fails to go out, this indica-
tes 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 driving, 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 ti-
res are installed, the control unit may misin-
terpret 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 282.
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 (17, 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.

226
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 235.
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.
Example of a tire pressure plate BInformation on the tire pressure plate B
A Information for tire sealant, seating capacity,
vehicle load limit
B Approved tire size for the front axle
C Permissible tire pressure for the front axle
D Tire pressure for fully loaded or partially
loaded vehicle
E Permissible tire pressure for the rear axle
F Approved tire size for the rear axle

Vehicle Identification, Technical Data
283
fWhen changing tires or fitting new ones: Please observe the chapter “WHEEL BOLTS” on Page 241.
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.
f Before mounting new tires, check with yourPorsche dealer about the current release status.
Boxster S Tires 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 XL 9 J x 18 H2 43 mm 60.2 in./1528 mm
or front 235/35 ZR 19 87Y 8 J x 19 H2 57 mm 58.5 in./1486 mm
rear 265/35 ZR 19 94Y 9.5 J x 19 H2 46 mm 60.0 in./1522 mm
Snow tires front 255/40 R 18 91V M+S 8 J x 18 H2 57 mm 58.5 in./1486 mm
rear * 255/40 R 18 95V M+S 9 J x 18 H2 43 mm 60.2 in./1528 mm
The load capacity coefficient (e.g. “91”) and maximum sp eed code letter (e.g. “Y”) are minimum requirements.
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 roadab ility and handling characteristics might be impaired. Since Porsche has no data on
such combinations, Porsche cannot st and 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 on ly with the tire + rim combination marked.

Index
295
RRadiator fans .............................................. 187
Radio reception .......................................... 155
Rain sensor ................................................ 126
Range on remaining fuel ........................93
, 114
Rear fog light .....................................124, 269
Rear lid ...................................................... 148
Rear spoiler............................................68, 69
Rear view mirrors ......................................... 31
Rear window defogger.................................. 33
Rear wing
Retractable........................................... 68
Relays ........................................................ 246
Release button ........................................... 163
Remote control ............................................. 18
Replacement key .......................................... 17
Replacing bulbs .......................................... 259
Replacing wiper blades................................ 185
Retractable spoiler........................................ 68
Rims
Diameter ............................................ 234
Rim width ........................................... 234
Running in .................................................... 14
SSafety belts ..........................................42
, 217
Warning light ........................................ 43
Safety compliance sticker ........................... 278
Sealing set ................................................. 239
Seals, care of ............................................. 215
Seat ............................................................ 34
Adjustment ........................................... 34
Heating ................................................ 38Memory................................................36
Selector lever .............................................163
Selector lever position indicator ............ 87
, 165
Shifting gear ...............................................162
Shiftlock .....................................................163
Side lights ..................................................269
Side marker light ............................... 124, 268
Side vents ..................................................136
Snow chains .............................. 232
, 283
, 284
Snow tires ......................................... 231, 282
Sockets .....................................................140
Spacers .....................................................244
Spare key .....................................................17
Spare wheel ...............................................284
Speed code letter .......................................233
Speed control .............................. 82
, 129
, 130
Speed limit .......................................... 94, 233
Speedometer................................................84
Spoiler .........................................................68
Fixed ....................................................69
Retractable ...........................................68
Sport mode ..................................... 63
, 66, 67
Sports seat ..................................................34
Stability management system (PSM) ...............64
Starting ................................................. 74, 75
Starting and stopping the engine ....................74
Steering wheel
Adjustment ...........................................39
Buttons ................................................40
Lock ................................. 74
, 75, 76, 77
Rocker switches..................................163
Toggle switches ..................................163
Stopwatch ....................................................98
Storage options ..........................................142
Storing your Porsche..................................218Sun visors ................................................... 41
TTachometer ................................................. 85
Tail light ..................................................... 269
Tank .................................................. 196
, 197
cap ................................................... 197
Ventilation system.............................. 202
Telephone .................................................. 157
Temperature setting........................... 130, 133
Temperature, outside indicator ...................... 89
Test stand, measurements ............................ 66
Theft protection ........................................... 16
Tiptronic .................................................... 163
Indicator .............................................. 87
Tire pressure monitoring ............................. 103
Tires ................................... 14
, 221
, 282
, 283
Checking pressure............................. 241
Inscription .......................................... 233
Loading information ............................ 235
Pressure................................ 5
, 224
, 283
Pressure plate.................................... 279
Sealant .............................................. 239
Sidewall ............................................. 233
Size .................................................. 233
Tires and tire care ...................................... 221
Tools ......................................................... 152
Towing .............................................. 274, 275
Track ........................................................ 282
Transmission ............................. 161
, 162
, 281
Fluid .......................................... 208, 286
Trunk entrapment ....................................... 148
Turn signals ......................................... 85, 125

296UUndercoating ............................. 200
, 214
, 215
VValves ........................................................ 229
Vanity mirror................................................. 41
Vehicle
Care .................................................. 209
Data bank........................................... 278
Identifikation number ........................... 278
Laying up the car................................ 251
Putting into operation .......................... 252
Washing ............................................. 209
Ventilation .................................................. 133
Vents .................................................130
, 133
Viscosity, engine oil.................................... 190
WWarning messages ..................................... 116
Washer fluid .......................................202
, 286
Washer lever .............................................. 126
Washing ..................................................... 209
Weights...................................................... 287
Welcome Home Function............................. 124
Wheel ............................... 216
, 221
, 282
, 283
Bolts ............................................17, 241
Changing............................................ 242
Checking pressure..........................5, 241
Inscription .......................................... 233
Loading information............................ 235
Pressure plate .................................... 279
Sidewall ............................................. 233Size ................................................... 233
Tire pressure ................................. 5
, 224
Tire sealant ........................................ 239
Windows ............................... 25
, 28, 170
, 214
Washer nozzles................................... 126
Washer system .......................... 202, 286
Windshield wipers .............................. 126, 185
Replacing ........................................... 185
Windstop .................................................... 177
Winter driving
Battery ............................................... 250
Jump lead starting.............................. 256
Winter operation
Coolant .............................................. 186
Seals ................................................. 215
Snow chains ....................................... 232
Tires .................................................. 231
Washer fluid........................................ 202
Wiper blades....................................... 185