Porsche 911 2020 Owner's Manual page 308

Wheels and Tires
A
NOTICE
B
Risk of damage to the vehicle and to the tires. Dam-
C
age due to overloading is not covered by the vehicle
D warranty.
Tire damage may also be caused by overloading, and
E
this damage is not covered by your tire warranty.
F e Do not overload your vehicle. Be careful about
the roof load.
G
e If you plan to load the vehicle, first correct the
H
tire pressure. Tire pressure for loaded vehicle can
be found on the tire pressure plate and in the
I
chapter "Technical Data".
J
e Never exceed the specified axle load.
K
Inflating tires
L
M
Hot filler hose
CAUTION
N
The compressor filler hose can become hot during
O
filling and cause burns.
P
e Wear gloves.
Q
The compressor is located under the cover in the
R
luggage compartment.
> Please see chapter "Luggage Compartment" on
S
page 162.
T > Comply with the operating instructions on the
compressor.
U
1. Screw the compressor filler hose onto the tire
V
valve.
W
2. Connect the compressor to a socket in the ve-
hicle and switch on the compressor.
X
Y
Z
306
The tire is inflated.
3. Check inflation pressure using the pressure gage
and reduce tire pressure or continue filling as
required. Check the inflation pressure again.
4. Switch off the compressor.
5. Unscrew the compressor filler hose.
Information
You can also check the tire pressure and inflate your
tires at service stations.
Reducing inflation pressure
1. Switch off the compressor.
2. Open air bleed screw on the filler hose until the
correct inflation pressure is achieved.
Reading off inscription on tires
Fig. 244: Inscription on radial tires
A – Tire size
Example: P 265/40R18 (101Y)
– P – The tire is designed for Passenger vehicles.
This information is not included on all tires.
– 265 – Indication of tire width in mm.
– 40 – Indication of tire height to tire width ratio in
percent.
– R – Belt type code letter for radial.
– 18 – Indication of rim diameter in inches.
– 101 – Load capacity coefficient.
– Y – Speed code letter.
– XL (Extra Load) – Tire with increased load rating.
B – TIN (Tire Identification Number)
Example: DOT xx xx xxxx xxxx
The DOT symbol indicates that the tires comply with
the requirements of the US Department of Trans-
portation and provides information about:
– First two-digit code indicates the manufacturer's
identification mark.
– Second two-digit code indicates the tire size.
– Third four-digit code indicates the tire type code.
– Fourth four-digit code indicates the date of
manufacture. If, for example, the last four num-
bers 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 side walls and
their material composition.
D – Maximum permissible inflation pressure
The maximum permissible cold inflation pressure to
which a tire can be inflated.
e Do not exceed the permissible inflation pressure.
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 – Radial
The identification indicates if the tire has a radial
structure.