Tire identification marks
Uniform Tire Quality Grading
Quality grades can be found where applicable
on the tire sidewall between tread shoulder and
maximum section width. For example:
Knowledge of the labeling on the side of the tire
makes it easier to identify and choose the right
tires.
Tread wear 200 Traction AA
Temperature A
Tire size
e.g.
255/55 R 18 109 H
DOT Quality Grades
Nominal width in mm
Aspect ratio in Ξ
Belted construction – radial
Rim diameter in inches
Carrying capacity ID-code
(not in ZR tires)
Tread wear
Traction AA A B C
Temperature A B C
All passenger car tires must conform to
Federal Safety Requirements in addition
to these grades.<
Speed code letter
(in ZR tires before the R)
Tread wear
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
Speed letter
Q= up to 100 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
150 would wear one and one-half (1
γ) times as
well on the government course as a tire graded
100. The relative performance of tires depends
upon the actual conditions of their use, how-
ever, and may depart significantly from the
norm due to variations in driving habits, service
practices and differences in road characteris-
tics and climate.
Tire Identification Number
Tires with DOT codes meet the guidelines
of the US Department of Transportation.
Traction
DOT code:
The traction grades, from highest to lowest,
are AA, A, B, and C.
e.g.
DOT xxxx xxx 0806
These grades represent the tire's ability to stop
on wet pavement, as measured under con-
trolled conditions on specified government test
surfaces of asphalt and concrete. A tire marked
C may have poor traction performance.
Manufacturer code
for tire make
Tire size and tire design
Tire age
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.<
Tire age
The manufacturing date of tires is contained in
the tire coding: DOT ... 1207 indicates that the
tire was manufactured in week 12 of 2007.
BMW recommends that you replace all tires
after 6 years at most, even if some tires may last
for 10 years.
237
Online Edition for Part no. 01 41 0 014 248 - © 08/07 BMW AG
| Categories | BMW Manuals, BMW X5 Manuals |
|---|---|
| Tags | BMW 3.0si, BMW 4.8is, BMW E70, BMW X5 3.0si |
| Model Year | 2008 |
| Download File |
|
| Document File Type | |
| Copyright | Attribution Non-commercial |
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