Replacing wheels/tires, Wheel/tire condition replacing wheels/tires – BMW X5 4.8is SAV 2004 User Manual

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Wheel/tire condition

Replacing wheels/tires

Tire tread

The tread depth should not fall below
e

in/3 mm.

At tread depths below e in/3 mm there
is an increased risk of high-speed
hydroplaning, even when only small
amounts of water are present on the
road surface.

As winter tires display a noticeable loss
in their ability to cope with cold-
weather driving conditions once the
tread wears to below k/K in/4 mm, to
ensure continued safety you should
always have such tires replaced.

Wear indicators at the tread-groove
base, arrow, are distributed over the
tire's circumference and are marked on
the side of the tire with TWI – Tread
Wear Indicator. These indicators signal
at a tread depth of k/FK in/1.6 mm that
the legally permitted wear limit has
been reached.

390de331

Unprofessional attempts by lay-
men to service tires can lead to

damage and accidents.
Have this work performed by skilled
professionals only. The technicians at
your BMW Sports Activity Vehicle cen-
ter will be glad to assist you with the
required professional knowledge and
specialized equipment.

The correct wheel and tire combination
also affects various systems whose
function would otherwise be impaired,
e.g. ABS, DSC, xDrive.

Have the wheel and tire assemblies bal-
anced every time either a wheel or a tire
is replaced.

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 car-
casses can lead to unusually rapid
wear.