BMW X5 2002 Manual Do Utilizador

137

Overview

Controls

Maintenance

Repairs

Data

Index

Tire condition

Tire replacement

Proceed carefully to the nearest
BMW Sports Activity Vehicle center or
professional tire center, or have the
vehicle towed in to have it, its wheels
and tires inspected.
Tire damage (up to and including blow-
outs) can endanger the lives of both the
vehicle occupants and other road
users.

To maintain good handling and vehicle
response, use only tires of a single
tread configuration from a single manu-
facturer. BMW tests and approves
wheel/tire combinations.

DOT Quality Grades

Tread wear
Traction AA A B C
Temperature A B C

All passenger vehicle tires must
conform to Federal Safety

Requirements in addition to these
grades.

Tread wear

The tread wear grade is a comparative
rating based on the wear rate of the tire
when tested under controlled condi-
tions on a specified government test
course.
For example, a tire graded 150 would
wear one and one-half (1 g) times as
well on the government course as a tire
graded 100. The relative performance
of tires depends upon the actual condi-
tions of their use, however, and may
depart significantly from the norm due
to variations in driving habits, service
practices and differences in road char-
acteristics and climate.

Traction

The traction grades, from highest to
lowest, are AA, A, B, and C.
Those grades represent the tire's ability
to stop on wet pavement as measured
under controlled conditions on speci-
fied government test surfaces of
asphalt and concrete. A tire marked C
may have poor traction performance.

The traction grade assigned to
this tire is based on straight-

ahead braking traction tests, and does
not include acceleration, cornering,
aquaplaning, or peak traction charac-
teristics.