Tire coding
6 years, even though the tires may have a theo-
retical service life of up to 10 years.
Knowledge of the labeling on the side of the tire
makes it easier to identify and choose the right
tires.
Uniform Tire Quality Grading
Quality grades can be found where applicable
on the tire sidewall between tread shoulder and
maximum section width. For example:
Tire size
e.g.
245/50 R 18 100 V
Tread wear 200 Traction AA
Temperature A
Nominal width in mm
Aspect ratio in Ξ
Radial tire code
DOT Quality Grades
Tread wear
Rim diameter in inches
Load rating,
not for ZR tires
Traction AA A B C
Temperature A B C
Speed rating,
before R on ZR tires
All passenger car tires must conform to
Federal Safety Requirements in addition
to these grades.<
Speed rating
Tread wear
Q = up to 105 mph/160 km/h
T = up to 118 mph/190 km/h
H = up to 131 mph/210 km/h
V = up to 150 mph/240 km/h
W = up to 167 mph/270 km/h
Y = up to 186 mph/300 km/h
The tread wear grade is a comparative rating
based on the wear rate of the tire when tested
under controlled conditions on a specified gov-
ernment test course.
For example, a tire graded 150 would wear one
and one-half, 1γ, times as well on the govern-
ment course as a tire graded 100. The relative
performance of tires depends upon the actual
conditions of their use, however, and may devi-
ate significantly from the norm due to variations
in driving habits, service practices and differ-
ences in road characteristics and climate.
Tire Identification Number
Tires with DOT codes meet the guidelines of
the U.S. Department of Transportation.
DOT code:
e.g.
DOT xxxx xxx 1007
Traction
Manufacturer code
for tire makes
The traction grades, from highest to lowest, are
AA, A, B, and C.
Tire size and tire design
Tire age
Those grades represent the tire's ability to stop
on wet pavement as measured under controlled
conditions on specified government test sur-
faces of asphalt and concrete. A tire marked C
may have poor traction performance.
Tire age
The tire's date of manufacture is indicated on
the sidewall:
DOT...1007 means that the tire was manufac-
tured in the 10th week of 2007.
The traction grade assigned to this tire is
based on straight-ahead braking traction
tests, and does not include acceleration, cor-
nering, hydroplaning, or peak traction charac-
teristics.<
BMW recommends that you replace all tires –
including the spare – after a maximum of
203
Online Edition for Part no. 01 41 0 013 316 - © 02/07 BMW AG
| Categories | BMW 7-Series Manuals, BMW Manuals |
|---|---|
| Tags | BMW 750i, BMW 750Li, BMW 760Li, BMW E65, BMW E66 |
| Model Year | 2007 |
| Download File |
|
| Document File Type | |
| Copyright | Attribution Non-commercial |
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Need to Know about some symbols