BMW 2011 328i Sedan Manual De Propietario

 221

Knowledge of the labeling on the side of the tire 
makes it easier to identify and choose the right 
tires.

Q = up to 100 mph or 160 km/h
T = up to 118 mph or 190 km/h
H = up to 131 mph or 210 km/h
V = up to 150 mph or 240 km/h
W = up to 167 mph or 270 km/h
Y = up to 186 mph or 300 km/h

Tires with DOT codes meet the guidelines of 
the US Department of Transportation.
DOT code:

The manufacturing date of tires is contained in 
the tire coding: DOT … 1010 means that the 
tire was manufactured in week 10 of 2010.
BMW recommends that you replace all tires 
after 6 years at most, even if some tires may last 
for 10 years.

Quality grades can be found where applicable 
on the tire sidewall between tread shoulder and 
maximum section width. For example:
Tread wear 200 Traction AA 
Temperature A

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.

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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 (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.

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 specified government test sur-
faces 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, cor-
nering, hydroplaning, or peak traction charac-
teristics.

<

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 

e.g.
Nominal width in mm
Aspect ratio in 

Ξ 

Radial belt construction
Rim diameter in inches
Load rating,
not on ZR tires
Speed code letter, in
front of the R on ZR tires

225/45 R

17 91 V

e.g.
Manufacturer's 
code for tire make
Tire size and 
tire design
Tire age

DOT xxxx xxx 1010

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