BMW Motorrad R 1250RT, Rider'S Manual

Page: 218 / 379

212 MAINTENANCE
Tyre pressure, rear
2.9 bar (tyre cold)
If tyre pressure is too low:
Correct tyre pressure.
Checking tyre tread depth
WARNING
Riding with badly worn tyres
Risk of accident due to im-
paired handling
If applicable, have the tyres
changed in good time be-
fore they wear to the min-
imum tread depth permitted
by law.
Make sure the ground is level
and firm and place the motor-
cycle on its stand.
Measure the tyre tread depth
in the main tread grooves
with wear marks.
Wear indicators are built
into the main profile
grooves on each tyre. The tyre
is worn out when the tyre tread
has worn down to the level of
the marks. The locations of
the marks are indicated on the
edge of the tyre, e.g. by the
letters TI, TWI or by an arrow.
If the tyre tread is worn to min-
imum:
Replace tyre or tyres, as ap-
plicable.
WHEEL RIMS
Checking rims
Make sure the ground is level
and firm and place the motor-
cycle on its stand.
Visually inspect the rims for
defects.
Have any damaged rims in-
spected by a specialist work-
shop and replaced if neces-
sary, preferably by an author-
ised BMW Motorrad dealer.
WHEELS
Effect of wheel size on
chassis and suspension
control systems
Wheel size is very important as
a parameter for the suspension
control systems. In particular,
the diameter and the width
of a vehicle's wheels are pro-
grammed into the control unit
and are fundamental to all cal-
culations. Any change in these
influencing variables, caused for
example by a switch to wheels
other than those installed ex-
works, can have serious effects
on the performance of the con-
trol systems.