Wheels and tyres
220
Wheels and tyres
Tyre pressures
Information for your safety
The condition of the tyres and maintenance of
the correct tyre pressures not only influence
tyre life but are also decisive factors in ride qual-
ity and above all in road safety.
Checking pressures
Check and adjust the tyre pressures
– including the spare wheel – on a regular
basis, but at least twice a month and before set-
ting out on any long journey. Incorrect tyre
pressures can adversely affect the car's road-
holding and cause tyre damage, which could
result in an accident.<
After correcting tyre pressures, reinitial-
ise the Run Flat Indicator, see page 87.<
Tyre pressure values
The tyre pressures for the approved tyre sizes
are visible on the driver's door post, with the
driver's door open.
If you do not see any tyre pressures listed
for your tyres' speed code, observe the tyre
pressures for the corresponding size, e.g.
225/60 R 17.
Tyre pressures for trailer towing
For trailer towing, the tyre pressures for the
higher load apply.
Note tyre size
These tyre pressures apply to sizes of tyre
approved by BMW and makes of tyre recom-
mended by BMW; details are available from
BMW Service.
Condition of tyres
Inspect tyres frequently for damage, the pres-
ence of foreign bodies, unusual wear and suffi-
cient tread depth.
Minimum tread depth
The tread depth should not be allowed to drop
below 3 mm, approx. 1/8 in. Below a tread
depth of 3 mm, approx. 1/8 in, there is an
increased risk of aquaplaning when driving on
wet roads at fairly high speeds.
Below a tread depth of 4 mm, approx. 3/16 in,
winter tyres become noticeably less suitable for
winter driving conditions. New tyres should be
fitted in the interests of safety.
Wear indicators in the base of the tread groove
are distributed around the tyre's circumference;
the letters TWI – Tread Wear Indicator – on the
tyre's flanks identify tyres that incorporate
these wear indicators. Once the tyre tread has
worn down to the wear indicators, a tread depth
of 1.6 mm, approx. 1/16 in, has been reached.
Online Edition for Part no. 01 41 0 013 197 - © 02/07 BMW AG
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