BMW 7 Series Owner's Manual page 330

MOBILITY
Tire size Wheel size
245/50 R19 8.5J x 19
Information on the wheel size and rim offset is
located on the inside of the wheel.
The list can also include wheel/tire sizes that
are only suitable for certain models.
Information about approved wheels and tires
for the vehicle can be requested from an au-
thorized service center or another qualified
service center or repair shop.
Follow the tire chain manufacturer's instruc-
tions.
If equipped with a Tire Pressure Monitor: with
tire chains, do not reset the Tire Pressure
Monitor, otherwise, incorrect displays may oc-
cur.
If the vehicle is equipped with a flat tire mon-
itor: with tire chains, do not initialize the flat
tire monitor, otherwise, incorrect displays may
occur.
When driving with tire chains, activate the
drive-off support to optimize the drive power.
Maximum speed with tire chains
Do not exceed a speed of 30 mph/50 km/h
when using tire chains.
Rear axle steering during operation
with snow chains
General information
In order to guarantee free movement of the
wheels when operating with tire chains, rear
axle steering must be turned off when tire
chains are mounted.
330
Wheels and tires
Rim offset (IS)
26
Online Edition for Part no. 01405A5EA63 - VI/22
Safety information
Warning
When rear axle steering is switched on and
tire chains are mounted, there can be contact
between tire chains and the body. There may
be a risk of accident or risk of damage to
property. With mounted tire chains, switch off
the rear axle steering.
Switching off rear axle steering
The rear axle steering is switched off by speci-
fying that tire chains are installed.
1. "MENU"
2. "Vehicle apps"
3. "Driving settings"
4. "Drivetrain and chassis"
5. "Tire chains"
Starting with the permissible maximum speed
with snow chains of 30 mph/50 km/h the rear
axle steering will be switched on again auto-
matically.
Tire pressure monitor
Principle
The Tire Pressure Monitor monitors the tire
pressure and issues a warning if the tire pres-
sure has dropped.
General information
Sensors in the tire valves measure the tire in-
flation pressure and tire temperature.
Depending on the tires detected or registered,
the system displays the specified nominal
pressures on the control display and compares
them with the current tire pressures.
If tires are being used that are not specified
in the tire inflation pressure details on the ve-
hicle, such as tires with special approval, the