BMW R 1250RS, Rider'S Manual, Page: 161 / 279

Minimum speed for
transmission of the RDC
measured values:
min 30 km/h
The display shows
"--"
for each
tyre until the tyre-pressure signal
is received for the first time. The
sensors continue to transmit the
measured-value signals for some
time after the vehicle comes to a
stop.
Time for transmission of
measured values after
vehicle comes to a stop:
min 15 min
An error message is issued if
wheels without sensors are fit-
ted to a vehicle equipped with an
RDC control unit.
Tyre pressure ranges
The RDC control unit differenti-
ates between three tyre-pressure
ranges, all of which are paramet-
erised for the motorcycle:
Tyre pressure within permitted
tolerance.
Tyre pressure close to limit of
permitted tolerance.
Tyre pressure outside permit-
ted tolerance.
Temperature
compensation
Tyre pressure is a temperature-
sensitive variable: pressure in-
creases as tyre-air temperature
rises and decreases as tyre-air
temperature drops. Tyre-air tem-
perature depends on ambient
temperature as well as on the
style of riding and the duration of
the ride.
The tyre pressures
are shown in the TFT
display as temperature
compensated and always
refer to the following tyre air
temperature:
20 °C
The air lines available to the pub-
lic in petrol stations and motor-
way service areas have gauges
that do not compensate for tem-
perature; the reading shown by
a gauge of this nature is the
temperature-dependent tyre-air
pressure. As a result, the val-
ues displayed there usually do
not correspond to the values dis-
played in the TFT display.
Pressure adaptation
Compare the RDC value on the
TFT display with the value in the
table on the back cover of the
Rider's Manual. Then use the
air-line gauge at a service station
8
159
z Engineering details