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EnglishWheels and tires -> Tire identification marks for your BMW X4 2014-2018
Mobility
Wheels and tires
Tire size
Pressure specifications
in bar/PSI
Tire size
Pressure specifications
in bar/PSI
Front: 245/35 R 21 2.8 / 41
96 Y XL RSC
-
Rear: 275/35 ZR
20 102 Y XL Std
-
2.8 / 41
Rear: 275/30 R 21
98 Y XL RSC
-
3.2 / 46
Front: 245/35 R 21 2.8 / 41
96 Y XL RSC
-
Emergency wheel: Speed up to a max. of
Rear: 275/30 R 21
98 Y XL RSC
-
3.2 / 46
50 mph / 80 km/h
T 135/80 R 18 104
M
4.2 / 60
Emergency wheel: Speed up to a max. of
50 mph / 80 km/h
T 135/80 R 18 104
X4 M40i
M
4.2 / 60
Tire size
Pressure specifications
in bar/PSI
Tire identification marks
Specifications in
bar/PSI with cold
tires
Tire size
245/45 R 18 96 Y
245: nominal width in mm
45: aspect ratio in %
245/50 R 18 100
H M+S RSC
2.6 / 38
3.0 / 44
3.2 / 46
R: radial tire code
245/50 R 18 100 V
M+S A/S RSC
18: rim diameter in inches
96: load rating, not for ZR tires
Y: speed rating, before the R on ZR tires
245/45 R 19 102 V 2.8 / 41
M+S XL A/S RSC
245/45 R 19 102 V
M+S XL RSC
Speed letter
Q = up to 100 mph, 160 km/h
R = up to 106 mph, 170 km/h
S = up to 112 mph, 180 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
Front: 245/45 R 19 2.6 / 38
98 W RSC
-
Rear: 275/40 R 19
101 W RSC
-
2.8 / 41
Front: 245/40 R 20 2.6 / 38
99 Y XL Std/RSC
-
Rear: 275/35 R 20
102 Y XL Std/RSC
-
2.8 / 41
-
Tire Identification Number
DOT code: DOT xxxx xxx 2116
xxxx: manufacturer code for the tire brand
xxx: tire size and tire design
Front: 245/40 ZR
20 99 Y XL Std
2.6 / 38
204
Wheels and tires
Mobility
2116: tire age
Traction
Tires with DOT codes meet the guidelines of
the U.S. Department of Transportation.
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 surfaces of asphalt and concrete. A tire
marked C may have poor traction performance.
Tire age
DOT … 2116: the tire was manufactured in the
21st week of 2016.
Recommendation
Regardless of wear and tear, replace tires at
least every 6 years.
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.
Uniform Tire Quality Grading
Temperature
Quality grades can be found where applicable
on the tire sidewall between tread shoulder
and maximum section width.
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 ma‐
terial 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
vehicle tires must meet under the Federal Mo‐
tor Vehicle Safety Standard No. 109. Grades
Band A represent higher levels of performance
on the laboratory test wheel than the minimum
required by law.
E.g.: Treadwear 200; Traction AA; Tempera‐
ture A
DOT Quality Grades
Treadwear
Traction AA A B C
Temperature A B C
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 es‐
tablished 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.◀
RSC – Run-flat tires
Run-flat tires, refer to page 208, are labeled
with a circular symbol containing the letters
RSC marked on the sidewall.
205
Mobility
Wheels and tires
Driving over rough or damaged road surfaces,
as well as debris, curbs and other obstacles
can cause serious damage to wheels, tires and
suspension parts. This is more likely to occur
with low-profile tires, which provide less cush‐
ioning between the wheel and the road. Be
careful to avoid road hazards and reduce your
speed, especially if your vehicle is equipped
with low-profile tires.
M+S
Winter and all-season tires with better cold
weather performance than summer tires.
Tire tread
Summer tires
Do not drive with a tire tread depth of less than
0.12 inches/3 mm.
Indications of tire damage or other vehicle mal‐
functions:
There is an increased risk of hydroplaning if
the tire tread depth is less than 0.12 in‐
ches/3 mm.
▷
▷
Unusual vibrations while driving.
Unusual handling such as a strong ten‐
dency to pull to the left or right.
Winter tires
Do not drive with a tire tread depth of less than
0.16 inches/4 mm.
Damage can, e.g., be caused by driving over
curbs, road damage, or similar things.
Safety information
Below a tread depth of 0.16 inches/4 mm, tires
are less suitable for winter operation.
WARNING
Damaged tires can lose tire inflation
pressure, which can lead to loss of vehicle
control. There is a risk of an accident. If tire
damage is suspected while driving, immedi‐
ately reduce speed and stop. Have wheels and
tires checked. For this purpose, drive carefully
to the nearest dealer’s service center or an‐
other qualified service center or repair shop.
Have vehicle towed or transported as
needed.◀
Minimum tread depth
WARNING
Wear indicators are distributed around the
tire's circumference and have the legally re‐
quired minimum height of 0.063 in‐
ches/1.6 mm.
Damaged tires can lose tire inflation
pressure, which can lead to loss of vehicle
control. There is a risk of an accident. Do not
repair damaged tires, but have them re‐
placed.◀
They are marked on the side of the tire with
TWI, Tread Wear Indicator.
Changing wheels and tires
Tire damage
Mounting
General information
Inspect your tires regularly for damage, foreign
objects lodged in the tread, and tread wear.
Have mounting and wheel balancing carried
out by a dealer’s service center or another
qualified service center or repair shop.
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