Run flat tires fitted, Wheel and tire replacement, Wheels and tires – BMW Z4 Roadster 2.5i 2005 User Manual

Page 84

Wheels and tires

Run Flat tires fitted

Run Flat tires are labeled on the sidewall with a
circular symbol containing the letters RSC.
Run Flat tires consist of self-supporting tires
and special rims. The tire reinforcement
ensures that driving remains possible to a
restricted degree in the event of pressure drop
or even if the tire is deflated.

Wheel and tire replacement

Have new wheels and tires mounted only
by a BMW center or specialized tire shop

that works according to BMW requirements
with the appropriately trained personnel. Work
that is improperly carried out could result in
consequential damage and pose safety haz-
ards. Make sure that the new wheels are bal-
anced.

BMW advises against using retreaded
tires, since driving safety may be

impaired. This is due to possible variations in
casing structures and, in some cases, to their
extreme age, factors which can lead to a
decrease in their durability.

The correct wheels and tires

BMW recommends using only wheels
and tires that have been approved by

BMW for your particular vehicle model, as oth-
erwise body contact and serious accidents can
result despite the use of the same nominal size,
e.g. due to manufacturing tolerances. If non-
approved wheels and tires are used, BMW can-
not evaluate their suitability, and therefore can-
not be held liable for driving safety.

Your BMW center can provide you with infor-
mation about the correct wheel and tire combi-
nations for your vehicle.
The correct wheel and tire combination also
affects other systems which would otherwise
be impaired, for example ABS or DSC.
To maintain good handling and vehicle
response, use only tires of a single brand and
tread configuration. In the event of a flat tire,
remount the previous wheel and tire combina-
tion as soon as possible.

Recommended tire brands

BMW tests certain tire brands for each tire size,
classifies them as road-safe and approves
them. You can best find out about these at a
specialized shop, particularly your BMW center.
Observe any country-specific regulations, e.g.
on making a corresponding entry in the vehicle
documents.
The factory-approved radial-ply tires are
matched to your vehicle and have been
selected to provide optimum safety and driving
comfort when used properly.

Run Flat tires

When mounting new tires or replacing summer
tires with winter tires, or vice versa, use Run Flat
tires since no spare wheel is available in the
event of a flat. Your BMW center will be glad to
provide you with more information.

For safety reasons, BMW recommends to
have Run Flat tires replaced, not repaired,

if they are damaged.

Special characteristics of winter tires

BMW recommends the use of winter tires for
operation under winter road conditions. While
all-season tires with M+S designation provide
better winter traction than summer tires, they
generally do not achieve the full performance of
winter tires.

Observing speed ratings

Never exceed the maximum speed for
which the winter tires are rated. Unpro-

fessional attempts by laymen to service tires