run flat ALFA ROMEO STELVIO 2021 User Guide

SERVICING AND MAINTENANCE

242

2.9L Engine
Radial Ply Tires Tire Repair
If your tire becomes damaged, it may be
repaired if it meets the following criteria:
The tire has not been driven on when flat.
The damage is only on the tread section of
your tire (sidewall damage is not repairable).
The puncture is no greater than a ¼ of an
inch (6 mm).Consult an authorized tire dealer for tire
repairs and additional information.
Damaged Run Flat tires, or Run Flat tires that
have experienced a loss of pressure should be
replaced immediately with another Run Flat
tire of identical size and service description
(Load Index and Speed Symbol). Replace the
tire pressure sensor as well as it is not
designed to be reused.
TiresWheel
Recommended Cold Tire Inflation
PressureHigh Speed Tire Inflation Pressure
FrontRearFrontRear
255/45R20 101Y
(Original Equipment) 20x9J
36 psi / 250 kpa -39 psi / 270 kpa -
255/40 R21 102Y XL (Original Equipment) 21x9J
39 psi / 270 kpa -39 psi / 270 kpa -
285/40R20 104Y
(Original Equipment) 20x10J
-39 psi / 270 kpa -42 psi / 290 kpa
285/35 R21 105Y XL (Original Equipment) 21x10J
-42 psi / 290 kpa -42 psi / 290 kpa
255/45R20 M+S (Snow Tires) 20x9J
36 psi / 250 kpa -39 psi / 270 kpa -
255/40 R21 M+S (Snow Tires) 21x9J
39 psi / 270 kpa -39 psi / 270 kpa -
255/45R20 M+S (Snow Tires) 20x9J
-39 psi / 270 kpa -42 psi / 290 kpa
285/35 R21 M+S (Snow Tires) 21x9J
-42 psi / 290 kpa -42 psi / 290 kpa
WARNING!
Combining radial ply tires with other types
of tires on your vehicle will cause your
vehicle to handle poorly. The instability
could cause a collision. Always use radial
ply tires in sets of four. Never combine them
with other types of tires.
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243

Run Flat Tires — If Equipped
Run Flat tires allow you the capability to drive
50 miles (80 km) at 50 mph (80 km/h) after a
rapid loss of inflation pressure. This rapid loss
of inflation is referred to as the Run Flat mode.
A Run Flat mode occurs when the tire inflation
pressure is of/or below 14 psi (96 kPa). Once
a Run Flat tire reaches the run flat mode it has
limited driving capabilities and needs to be
replaced immediately. A Run Flat tire is not
repairable. When a run flat tire is changed
after driving with underinflated tire condition,
please replace the TPM sensor as it is not
designed to be reused when driven under run
flat mode 14 psi (96 kPa) condition.

NOTE:

TPM Sensor must be replaced after driving the
vehicle on a flat tire condition.
It is not recommended driving a vehicle loaded
at full capacity or to tow a trailer while a tire is
in the run flat mode.
For more information
Ú
page 161.
Tire Spinning

When stuck in mud, sand, snow, or ice condi -
tions, do not spin your vehicle's wheels above
30 mph (48 km/h) or for longer than 30 seconds
continuously without stopping.

Tread Wear Indicators
Tread wear indicators are in the original equip -
ment tires to help you in determining when
your tires should be replaced.
Tire Tread These indicators are molded into the bottom of
the tread grooves. They will appear as bands
when the tread depth becomes a 1/16 of an
inch (1.6 mm). When the tread is worn to the
tread wear indicators, the tire should be
replaced.
Life Of Tire
The service life of a tire is dependent upon
varying factors including, but not limited to:
Driving style.
Tire pressure - Improper cold tire inflation
pressures can cause uneven wear patterns
to develop across the tire tread. These
abnormal wear patterns will reduce tread
life, resulting in the need for earlier tire
replacement.
Distance driven.
Performance tires, tires with a speed rating
of V or higher, and Summer tires typically
have a reduced tread life. Rotation of these
tires per the vehicle scheduled mainte
-
nance is highly recommended.
WARNING!

Fast spinning tires can be dangerous. Forces
generated by excessive wheel speeds may
cause tire damage or failure. A tire could
explode and injure someone. Do not spin
your vehicle's wheels faster than 30 mph
(48 km/h) for more than 30 seconds
continuously when you are stuck, and do not
let anyone near a spinning wheel, no matter
what the speed.

1 — Worn Tire
2 — New Tire
WARNING!
Tires and the spare tire should be replaced
after six years, regardless of the remaining
tread. Failure to follow this warning can
result in sudden tire failure. You could lose
control and have a collision resulting in
serious injury or death.
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