Wheels And Tires - BMW Z4 Owner's Manual

MOBILITY

Wheels and tires

Vehicle features and
options
This chapter describes all standard, country-spe‐
cific and optional features offered with the series.
It also describes features and functions that are
not necessarily available in your vehicle, e.g., due
to the selected options or country versions. This
also applies to safety-related functions and sys‐
tems. When using these functions and systems,
the applicable laws and regulations must be ob‐
served.
Tire inflation pressure
General information
The tire characteristics and tire inflation pressure
influence the following:
▷ The service life of the tires.
▷ Road safety.
▷ Driving comfort.
▷ Fuel consumption.
Safety information
Warning
A tire with too little or no tire inflation pressure
may heat up significantly and sustain damage.
This will have a negative impact on aspects of
handling, such as steering and braking re‐
sponse. There is a risk of accident. Regularly
check the tire inflation pressure, and correct it
as needed, for instance twice a month and be‐
fore a long trip.
252

Wheels and tires

Online Edition for Part no. 01402779113 - II/19
Tire inflation pressure
specifications
In the tire inflation pressure table
The tire inflation pressure table, refer to
page 254, contains all tire inflation pressure
specifications for the specified tire sizes at the
ambient temperature. The tire inflation pressure
values apply to tire sizes approved by the manu‐
facturer of the vehicle for the vehicle type.
To identify the correct tire inflation pressure,
please note the following:
▷ Tire sizes of your vehicle.
▷ Maximum permitted driving speed.
On the Control Display
The current tire inflation pressure values and the
intended tire inflation pressure values for the
mounted tires can be displayed on the Control
Display.
To ensure that they are displayed correctly, the
tire sizes must be stored in the system and must
have been set, refer to page 265, for the
mounted tires.
The current tire inflation pressure value is lo‐
cated on each tire.
The reference tire inflation pressure value is lo‐
cated in the lower area of the Control Display.
Checking the tire inflation
pressure
General information
Tires heat up while driving. The tire inflation
pressure increases with the tire temperature.
Tires have a natural, consistent loss of tire infla‐
tion pressure.
The displays of inflation devices may under-read
by up to 0.1 bar/2 psi.