2018 OPEL ASTRA GTC wheel size

Vehicle care199Vehicle careGeneral Information...................200
Accessories and vehicle modifications .......................... 200
Vehicle storage ........................200
End-of-life vehicle recovery .....201
Vehicle checks ........................... 201
Performing work ......................201
Bonnet ..................................... 201
Engine oil ................................. 202
Engine coolant ......................... 203
Power steering fluid .................204
Washer fluid ............................ 204
Brakes ..................................... 205
Brake fluid ............................... 205
Vehicle battery ......................... 205
Diesel fuel system bleeding .....207
Wiper blade replacement ........207
Bulb replacement .......................208
Halogen headlights ..................208
Adaptive forward lighting .........211
Fog lights ................................. 212
Front turn signal lights .............214
Tail lights ................................. 216
Side turn signal lights ..............219
Number plate light ...................221Interior lights ............................ 221
Instrument panel illumination ...221
Electrical system ........................222
Fuses ....................................... 222
Engine compartment fuse box . 223
Instrument panel fuse box .......225
Load compartment fuse box ....226
Vehicle tools .............................. 227
Tools ........................................ 227
Wheels and tyres .......................229
Winter tyres ............................. 229
Tyre designations ....................229
Tyre pressure .......................... 229
Tyre pressure monitoring system .................................... 231
Tread depth ............................. 234
Changing tyre and wheel size . 234
Wheel covers ........................... 235
Tyre chains .............................. 235
Tyre repair kit .......................... 235
Wheel changing .......................238
Spare wheel ............................ 242
Jump starting ............................. 246
Towing ....................................... 247
Towing the vehicle ...................247
Towing another vehicle ...........248Appearance care .......................249
Exterior care ............................ 249
Interior care ............................. 252

Vehicle care229Wheels and tyres
Tyre condition, wheel condition
Drive over edges slowly and at right
angles if possible. Driving over sharp
edges can cause tyre and wheel
damage. Do not trap tyres on the kerb when parking.
Regularly check the wheels for
damage. Seek the assistance of a
workshop in the event of damage or
unusual wear.
Winter tyres
Winter tyres improve driving safety at temperatures below 7 °C and should
therefore be fitted on all wheels.
In accordance with country-specific
regulations, affix the speed sticker in
the driver's field of view.4-door notchback
Tyre size 205/65 R16 is only suitable
as a winter tyre.
All engines except A14XER, B14XER, B14NEL, B14NET,
B14NET LPG, B16XER:Tyre size 215/50 R17 is only suitable
as a winter tyre.
Tyre designations E.g. 215/60 R 16 95 H215:tyre width, mm60:cross-section ratio (tyre height
to tyre width), %R:belt type: RadialRF:type: RunFlat16:wheel diameter, inches95:load index e.g. 95 is equivalent
to 690 kgH:speed code letter
Speed code letter:
Q:up to 160 km/hS:up to 180 km/hT:up to 190 km/hH:up to 210 km/hV:up to 240 km/hW:up to 270 km/h
Choose a tyre appropriate for the
maximum speed of your vehicle.
The maximum speed is achievable at kerb weight with driver (75 kg) plus
125 kg payload. Optional equipment
could reduce the maximum speed of
the vehicle.
Performance 3 265.
Directional tyres
Fit directional tyres such that they roll in the direction of travel. The rolling
direction is indicated by a symbol
(e.g. an arrow) on the sidewall.
Tyre pressure
Check the pressure of cold tyres at
least every 14 days and before any
long journey. Do not forget the spare
wheel. This also applies to vehicles
with tyre pressure monitoring system.

234Vehicle care9. Proceed to the right side frontwheel, and repeat the procedure
in Step 8.
10. Proceed to the right side rear wheel, and repeat the procedure
in Step 8.
11. Proceed to the left side rear wheel, and repeat the procedure
in Step 8. The horn sounds twice
to indicate the sensor
identification code has been
matched to the left side rear tyre,
and the tyre pressure sensor
matching process is no longer
active.
12. Turn off the ignition.
13. Set all four tyres to the recommended air pressure level
as indicated on the tyre pressure
label.
14. Ensure the tyre loading status is set according to the selected
pressure 3 93.
Tread depth Check tread depth at regular
intervals.Tyres should be replaced for safety
reasons at a tread depth of 2-3 mm
(4 mm for winter tyres).
For safety reasons it is recommended
that the tread depth of the tyres on
one axle should not vary by more than 2 mm.
The legally permissible minimum
tread depth (1.6 mm) has been
reached when the tread has worn
down as far as one of the tread wear
indicators (TWI). Their position is
indicated by markings on the
sidewall.
If there is more wear at the front than
the rear, swap round front wheels and rear wheels periodically. Ensure that
the direction of rotation of the wheels
is the same as before.
Tyres age, even if they are not used.
We recommend tyre replacement
every 6 years.
Changing tyre and wheel
size
If tyres of a different size than those
fitted at the factory are used, it may be necessary to reprogramme the
speedometer as well as the nominal
tyre pressure and make other vehicle modifications.
After converting to a different tyre
size, have the label with tyre
pressures replaced. 3 2319 Warning
The use of unsuitable tyres or
wheels may lead to accidents and will invalidate the vehicle
operating permit.

Vehicle care235Wheel covers
Wheel covers and tyres that are
factory approved for the respective
vehicle and comply with all of the
relevant wheel and tyre combination
requirements must be used.
If the wheel covers and tyres used are
not factory approved, the tyres must
not have a rim protection ridge.
Wheel covers must not impair brake
cooling.9 Warning
Use of unsuitable tyres or wheel
covers could lead to sudden
pressure loss and thereby
accidents.
Vehicles with steel wheels: When
using locking wheel nuts, do not
attach wheel covers.
Tyre chains
Use tyre chains only on front wheels.
9 Warning
Damage may lead to tyre blowout.
4-door notchback
Always use fine mesh chains that add no more than 10 mm to the tyre tread
and the inboard sides (including chain
lock).
Tyre chains are only permitted on
tyres of size 205/60 R16 and
215/50 R17.3-door hatchback
Tyre chains are permitted on tyres of
size 225/55 R17. Always use fine
mesh chains that add no more than
10 mm to the tyre tread and the
inboard sides (including chain lock).
Tyre chains are also permitted on
tyres of size 245/45 R18. Always use
fine mesh chains that add no more
than 7 mm to the tyre tread and the inboard sides (including chain lock).OPC Version
Tyre chains are permitted on tyres of
size 235/45 R18. Always use fine
mesh chains that add no more than
10 mm to the tyre tread and the
inboard sides (including chain lock).General
The use of tyre chains is not permitted on the temporary spare wheel.
Tyre repair kit
Minor damage to the tyre tread can be
repaired with the tyre repair kit.
Do not remove foreign bodies from
the tyres.

Vehicle care243Stowing a damaged full size
wheel in the load compartment,
3-door hatchback
The spare wheel well is not designed
for other tyre sizes than the spare
wheel. A damaged full size wheel
must be stowed in the load
compartment and secured with a
strap. Vehicle tools 3 227. To secure
the wheel:
1. Position the wheel facing upwards, close to one sidewall of
the load compartment.
2. Place the loop end of the strap through the front lashing eye on
the appropriate side.
3. Place the hook end of the strap through the loop and pull it until
the strap is fastened securely to
the lashing eye.
4. Insert the strap through the spokes of the wheel as shown in
the illustration.
5. Mount the hook to the rear lashing
eye.
6. Tighten the strap and secure it using the buckle.
9 Danger
Always drive with folded up and
engaged rear seat backrests when stowing a damaged full size wheel
in the load compartment.
Stowing a damaged full size
wheel in the spare wheel well,
4-door notchback
Vehicles equipped with a full size
spare wheel:
A damaged full size wheel must be
stowed outside up in the spare wheel
well secured with the wing nut.

244Vehicle careThe floor cover can be placed on the
projecting wheel.Vehicles equipped with a temporary
spare wheel:
Secure a damaged full size wheel
facing upwards with the wing nut in
the spare wheel well after exchanging the thread bolt by an extension bolt,
placed in the tool bag 3 227. To
replace the bolt:
1. Install the hexagon key of the wheel wrench ensuring that it
locates securely on the bolt.
2. Turn the wheel wrench anticlockwise to loosen the bolt.
Remove the bolt.
3. Take the extension bolt from the tool bag 3 227 and screw it in
hand-tight using the hexagon key
of the wheel wrench.
4. Store the tool box and the damaged wheel with the side
facing upwards, in the spare
wheel well and secure it by turning
the wing nut clockwise on the bolt.
The floor cover can be placed on the
projecting wheel.
Replace the extension bolt with the short bolt before placing the
temporary spare wheel in the well
after renewing or repairing the
defective wheel.
Stowing the spare wheel back in
the well after replacing the
damaged wheel
1. Open the floor cover, loosen and remove wing nut.
Only 3-door hatchback: open floor
cover, remove rear storage,
loosen and remove wing nut and
conus.
2. Only 4-door notchback with temporary spare wheel: replace
the extension bolt with the short
bolt by using the hexagon key of
the wheel wrench.
3. Place the tools in the tool box or the tool bag 3 227.
4. Place spare wheel facing upwards, in the wheel well and
secure by tightening the wing nut.

288IndexAAccessories and vehicle modifications .......................... 200
Active Emergency Braking .........173
Active head restraints ...................40
Adaptive cruise control .........92, 162
Adaptive forward lighting ....92,
120, 211
Adjustable air vents ...................137
Airbag and belt tensioners ...........87
Airbag deactivation ................54, 87
Airbag system .............................. 51
Air conditioning regular operation ................................ 138
Air conditioning system .............. 130
Air intake .................................... 137
Air vents...................................... 137
Antilock brake system ................ 152
Antilock brake system (ABS) .......89
Anti-theft alarm system ................29
Anti-theft locking system .............. 29
Appearance care ........................249
Armrest ................................... 47, 48
Armrest storage ........................... 62
Ashtrays ....................................... 79
Automatic anti-dazzle ..................33
Automatic light control ...............117
Automatic locking ........................26
Automatic transmission .............147Autostop..................................... 142
Auxiliary heater ........................... 136
B Battery discharge protection ......128
Battery voltage ........................... 102
Belts.............................................. 48 Bonnet ....................................... 201
Brake and clutch fluid .................254
Brake and clutch system .............88
Brake assist ............................... 154
Brake fluid .................................. 205
Brakes ............................... 152, 205
Breakdown.................................. 247
Bulb replacement ....................... 208
C
Capacities .................................. 270
Car Pass ...................................... 23
Catalytic converter .....................147
Central locking system ................24
Centre console lighting ..............127
Centre console storage ...............63
Changing tyre and wheel size ...234
Charging system .......................... 88
Child locks ................................... 26
Child restraint installation locations ................................... 57
Child restraints.............................. 55
Child restraint systems ................55
Cigarette lighter ........................... 79