BMW Motorrad F 900 XR, Rider'S Manual

Page: 141 / 261

Tire inflation pressure
ranges
The TPC control unit distin-
guishes between three inflation
pressure ranges matched to the
motorcycle:
Tire pressure within the per-
missible tolerance.
Tire pressure at the limits of
the permissible tolerance.
Tire pressure outside the per-
missible tolerance.
Temperature
compensation
The tire pressure is temperature
dependent, i.e. it increases or
decreases together with the tire
air temperature. The tire temper-
ature is dependent on the out-
side temperature, the riding style
and the length of the journey.
The tire pressures are
shown in the display with
temperature compensation
and are always based on the
following tire air temperature:
68 °F (20 °C)
Tire pressure gages at gas sta-
tions do not make any compen-
sation for the air temperature,
the tire pressure indicated de-
pends on the temperature of the
air in the tire. As a result, in most
cases the values displayed there
do not match the values shown
in the display.
Tire pressure adjustment
Compare the TPC value in the
display with the value on the
back cover of the operating in-
structions. The difference be-
tween the two values must be
compensated with the tire infla-
tion pressure tester at the filling
station.
Example
According to the operating
instructions, the tire pres-
sure should have the following
value:
36.3 psi (2.5 bar)
The following value is indi-
cated in the display:
33.4 psi (2.3 bar)
The shortfall is thus:
2.9 psi (0.2 bar)
The tester at the filling station
shows:
34.8 psi (2.4 bar)
To produce the correct tire
pressure, this must be in-
creased to the following value:
37.7 psi (2.6 bar)
8
139
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