BMW 2004 645Ci Convertible Manual Do Proprietário

Wheels and tires

168

Run-flat tires

You will recognize run-flat tires by a circular
symbol containing the letters RSC on the
side of the tire.
Run-flat tires consist of self-contained tires
and special rims. The tire reinforcement
ensures that the tire retains some residual
safety in the event of pressure drop and
driving remains possible to a restricted
degree.

Continuing driving with a damaged
tire

Driving on run-flat tires with tire damage
can continue, depending on the vehicle
load and the severity of the tire damage, at
a maximum speed of 50 mph/80 km/h.

You can estimate the possible mileage for
continued driving on the basis of the fol-
lowing general indications:

With low load:
1 to 2 persons without luggage:
Approx. 155 miles/250 km

With medium load:
2 persons, luggage compartment full, or
4 persons without luggage:
Approx. 94 miles/150 km

With full load:
4 persons, luggage compartment full:
Approx. 30 miles/50 km.

Drive reservedly and do not exceed
a speed of 50 mph/80 km/h. In the

event of pressure loss, vehicle handling
changes. This includes reduced track sta-
bility in braking, extended braking distance
and altered natural steering characteristics.
If unusual vibrations occur while the vehicle
is being driven, this can indicate final failure

of the damaged tire. Reduce speed and
stop as soon as possible. Do not continue
driving. Contact your BMW center.

New wheels and tires

You can find out the right wheel-tire combi-
nation from your BMW center. It is another
vital factor in ensuring reliable operation of
various vehicle systems such as ABS and
DSC. Have the wheel and tire assemblies
balanced every time either a wheel or a tire
is replaced.

Only have new wheels and tires
mounted by a specialist. If this work is

performed inexpertly, there is a danger of
damage and associated safety risks.

Retreaded tires

BMW does not recommend the use of
retread tires, as otherwise driving

safety may be reduced. Possible variations
in the design and the age – which could be
substantial – of the carcasses can lead to
unusually rapid wear.

The right wheels and tires

BMW recommends that you use only
wheel and tire combinations that

BMW has tested and approved for your
particular vehicle. Variations in factors such
as manufacturing tolerances mean that
even wheels and tires with identical official
size ratings could actually have different
dimensions than the approved units – these
differences could lead to body contact, and
with it the risk of severe accidents. If non-
approved wheels and tires are used, BMW
cannot evaluate their suitability, and there-
fore cannot be held liable for driving
safety.

To maintain good handling and vehicle
response, use only tires of a single tread
configuration from a single manufacturer.
After a flat tire, always remember to have
the specified wheel and tire combination
remounted on the vehicle as soon as pos-
sible.