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EnglishWheels and tires -> Tire tread for your BMW i4 2021-2025
Wheels and tires
MOBILITY
Temperature A B C
car tires must meet under the Federal Motor
Vehicle Safety Standard No. 109. Grades Band
A represent higher levels of performance on
the laboratory test wheel than the minimum
required by law.
All passenger vehicle tires must conform to
Federal Safety Requirements in addition to
these grades.
Treadwear
Warning
The treadwear 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. E.g., a tire graded 150
would wear one and one-half, 1 g, 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 temperature grade for this tire is estab-
lished for a tire that is properly inflated and
not overloaded. Excessive speed, underinfla-
tion, or excessive loading, either separately
or in combination, can cause heat buildup
and possible tire failure. There is a risk of
accident, injury, and property damage.
Runflat tires
Runflat tires, refer to page 311, are labeled
with a circular icon containing the letters RSC
marked on the tire sidewall.
Traction
The traction grades, from highest to lowest,
are AA, A, B, and C.
M+S
Those grades represent the tire's ability to
stop on wet pavement as measured under
controlled conditions on specified government
test surfaces of asphalt and concrete. A tire
marked C may have poor traction perform-
ance.
Winter tires, as well as all-season tires with
better winter performance than summer tires,
can be identified by the M+S marking on the
tire side wall.
Tire tread
Safety information
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.
Temperature
If the tire tread depth is too low, driving
safety may be impaired in critical situations
such as aquaplaning or slush on the road.
There is a risk of accident, injury, and prop-
erty damage. The tire tread depth may not
fall below 0.12 in/3 mm for summer tires and
0.16 in/4 mm for winter and all-season tires,
or observe the statutory regulations on mini-
mum tread depth.
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 conditions
on a specified indoor laboratory test wheel.
Sustained high temperature can cause the
material of the tire to degenerate and reduce
tire life, and excessive temperature can lead to
sudden tire failure. The grade C corresponds
to a level of performance which all passenger
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Wheels and tires
MOBILITY
Minimum tread depth
Safety information
Warning
Damaged tires can lose tire inflation pres-
sure, which can lead to loss of vehicle con-
trol. There is a risk of accident, injury, and
property damage. If tire damage is suspected
while driving, immediately reduce speed and
stop. Have wheels and tires checked. To do
so, drive carefully to an authorized service
center or another qualified service center or
repair shop. Have the vehicle towed or trans-
ported as needed. Do not repair damaged
tires, but have them replaced.
The tire manufacturer’s wear indicators are
distributed over the tire circumference. These
indicators have a height of min. 0.06 in/1.6 mm
and serve as an indicator for tire tread wear.
The positions of the wear indicators are
marked on the tire sidewall with TWI, Tread
Wear Indicator.
Warning
The wheels, tires and chassis components
can become damaged when driving over
curbs, road damage, or other obstacles.
Larger wheels have a smaller tire cross-sec-
tion. The smaller the tire cross-section, the
higher the risk of tire damage. There is a risk
of accident, injury, and property damage. If
possible, avoid driving over curbs, road dam-
age or other obstacles, or drive over them
slowly and carefully.
Tire damage
General information
Check your tires regularly for damage, foreign
objects lodged in the tread, and tread wear.
Indications of tire damage or another vehicle
malfunction:
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Unusual vibrations.
Unusual tire or running noises.
Exchanging wheels and
tires
Unusual vehicle handling such as a strong
tendency to pull to the left or right.
▷
Uneven wear pattern, e.g., increased wear
in the area of the tire shoulder.
Mounting and wheel balancing
Have the wheel mounted and balanced by an
authorized service center or another qualified
service center or repair shop.
Damage can be caused by the following situa-
tions, for instance:
▷
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Driving over curbs.
Road damage.
Suitable wheels and tires
Tire pressure too low.
Vehicle overloading.
Incorrect tire storage.
General information
Only certain wheel/tire combinations are suit-
able depending on vehicle and equipment.
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