Alfa Romeo STELVIO 2021, Руководство пользователя

Страница: 250 / 280

SERVICING AN
D M
AINTENAN
CE
248
Tire rotation contributes to the preservation of
the grip and traction performance on wet,
muddy or snowy roads, guaranteeing optimal
driveability of the vehicle.
In the case of irregular wear of the tires iden
-
tify the cause and correct it as soon as
possible, by contacting an authorized dealer.
The rotational direction of the tire must be
taken into consideration when rotating the
tires. The recommended rotation pattern for
directional tires is shown below.
Tire Rotation
It is recommended to avoid situations with a
large difference in wear between the front and
rear tires and to strictly use Winter tires of the
sizes given on the tire placard.
The AWD system and the original tires are
developed together to ensure the vehicle’s
best performance. When changing the tires, it
is recommended to us the same “AR” marked
tires, to maintain the same level of perfor -
mance and component life.
DEPARTMENT OF
TRANSPORTATION UNIFORM
TIRE QUALITY GRADES
The following tire grading categories
were established by the National
Highway Traffic Safety Administration.
The specific grade rating assigned by
the tire's manufacturer in each cate -
gory is shown on the sidewall of the
tires on your vehicle.
All passenger vehicle tires must
conform to Federal safety require -
ments in addition to these grades.
Treadwear
The Treadwear grade is a comparative
rating, based on the wear rate of the
tire when tested under controlled
conditions on a specified government
test course. For example, a tire graded
150 would wear one and one-half times
as well on the government course as a
tire graded 100. The relative perfor -
mance of tires depends upon the
actual conditions of their use, however,
and may depart significantly from the
norm due to variations in driving habits,
service practices, and differences in
road characteristics and climate.
Traction Grades
The Traction grades, from highest to
lowest, are AA, A, B, and C. These
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.
Temperature Grades
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,
when tested under controlled condi -
tions on a specified indoor laboratory
CAUTION!
Damage to the vehicle may occur if
different front and rear tire sizes are
rotated
WARNING!
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
characteristics.
21_GU_OM_EN_USC_t.book Page 248
www.inhauto.com