Wheels and tires, Tire inflation pressure, Tire condition – BMW 330Ci Coupe 2004 User Manual

Page 117

117

Wheels and tires

Tire inflation pressure

Information for your safety

The factory-approved tires are matched
to your vehicle and have been selected
to provide optimum safety and driving
comfort when used properly.

It is not merely the tire's service life, but
also driving comfort and – above all else
– driving safety that depend on the con-
dition of the tires and the maintenance
of the specified tire inflation pressure.

Incorrect tire inflation pressure is a fre-
quent cause of tire damage. It also sig-
nificantly influences the roadholding
ability of your BMW.

Be sure to check the tire inflation
pressure, including the space-

saver spare tire or the spare tire, on a
regular basis, at least twice a month
and before every extended journey,
refer to page

. If this is not done,

incorrect tire pressures can cause driv-
ing instability and tire damage, ulti-
mately resulting in accidents.

Tire condition

Tire tread – tire damage

Inspect your tires frequently for tread
wear, signs of damage and for foreign
objects lodged in the tread. Check the
tread depth.

Tread depth should not be allowed to
go below 1/8 in / 3 mm, even though
the legally specified minimum tread
depth is 1/16 in / 1.6 mm.

Below 1/8 in / 3 mm tread depth, there
is a great risk of hydroplaning, even at
relatively moderate speeds and with
only small amounts of water on the
road. Tread wear indicators in the
tread-groove base – see arrow – are
distributed around the wheel circumfer-
ence and are labeled on the tire side-

wall with TWI – Tread Wear Indicator. At
a tread depth of 1/16 in / 1.6 mm, the
indicators signal that the legally permis-
sible wear limit has been reached.

Overview

Controls

Maintenance

Repairs

Data

Index