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EnglishOperation, care and maintenance -> Tire replacement for your BMW 5 Series 1995-2003
Tire replacement
129n
Sustained high temperature can cause
To maintain good handling and vehicle practices and differences in road
response, use only tires of a single
tread configuration from a single manu-
facturer. BMW tests and approves
wheel/tire combinations. Refer to
page 133.
characteristics and climate.
the material of the tire to degenerate
and reduce tire life, and excessive
temperature can lead to sudden tire
failure. The grade C correspods to a
level of performance which all
Traction
The traction grades, from highest to
lowest, are AA, A, B and C.
passenger car tires must meet under
the Federal Motor Vehicle Safety Stan-
dard No. 109. Grades B and A repre-
sent higher levels of performance on
the laboratory test wheel than the
minimum required by law.
Those grades represent the tire's ability
to stop on wet pavement as measured
under controlled conditions on speci-
fied government test surfaces of
DOT Quality Grades
Tread wear
Traction AA A B C
Temperature A B C
asphalt and concrete. A tire marked C
may have poor traction performance.
All passenger vehicle tires must
conform to Federal Safety
Requirements in addition to these
grades.<
The temperature grade for this
tire is established for a tire that is
properly inflated and not overloaded.
Excessive speed, underinflation, or
excessive loading, either separately or
in combination, can cause heat buildup
and possible tire failure.<
The traction grade assigned to
this tire is based on straight-
ahead braking traction tests, and does
not include acceleration, cornering,
hydroplaning, or peak traction charac-
teristics.<
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.
Temperature
Uniform Tire Quality Grading
The temperature grades are A (the
highest), B and C, representing the
tire's resistance to the generation of
heat and its ability to dissipate heat
Quality grades can be found where
applicable on the tire sidewall between
tread shoulder and maximum section
width. For example:
For example, a tire graded 150 would
wear one and one-half (1 g) times as
well on the government course as a tire when tested under controlled condi-
graded 100. The relative performance tions on a specified indoor laboratory
Treadwear 200 Traction AA
Temperature A
of tires depends upon the actual condi- test wheel.
tions of their use, however, and may
depart significantly from the norm due
to variations in driving habits, service
