BMW 550I XDRIVE GRAN TURISMO 2014 Owners Manual

Wheels and tiresVehicle equipment
All standard, country-specific and optional
equipment that is offered in the model series is
described in this chapter. Therefore, equip‐
ment is also described that is not available in a
vehicle, e. g., because of the selected optional
equipment or country variant. This also applies
for safety-related functions and systems.
Tire inflation pressure Safety information
The tire characteristics and tire inflation pres‐
sure influence the following:▷The service life of the tires.▷Road safety.▷Driving comfort.
Checking the pressure
Only check the tire inflation pressure when the
tires are cold. This means after driving no more
than 1.25 miles/2 km or when the vehicle has
been parked for at least 2 hours. When the
tires are warm, the tire inflation pressure is
higher.
Check the tire inflation pressure regularly
Regularly check the tire inflation pres‐
sure, and correct it as needed: at least twice a
month and before a long trip. If you fail to ob‐
serve this precaution, you may be driving on
tires with incorrect tire pressures, a condition
that may not only compromise your vehicle's
driving stability, but also lead to tire damage
and the risk of an accident.◀
After correcting the tire inflation pressure:
▷Reinitialize the Flat Tire Monitor.▷Reinitialize the Tire Pressure Monitor.Pressure specifications The tire inflation pressure table, refer to
page 202, contains all pressure specifications
for the specified tire sizes at the ambient tem‐
perature. Pressure specifications apply to ap‐
proved tire sizes and recommended tire
brands. This information can be obtained from
your service center.
To identify the correct tire inflation pressure,
please note the following:▷Tire sizes of your vehicle.▷Maximum permitted driving speed.
Tire inflation pressures up to
100 mph/160 km/h
For speeds of up to 100 mph/160 km/h and for
optimum driving comfort, note the pressure
values in the tire inflation pressure table, refer
to page 202, and adjust as necessary.
These pressure values can also be found on
the tire inflation pressure label on the driver's
door pillar.
Maximum permissible speed
Do not exceed 100 mph/160 km/h; other‐
wise, tire damage and accidents may result.◀
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Tire inflation pressure values up to
100 mph/160 km/h
535i, 550iTire sizePressure specifica‐
tions in bar/PSISpecifications in
bar/PSI with cold tires245/50 R 18 100 V M
+S A/S RSC
245/50 R 18 100 H M
+S RSC2.2 / 322.4 / 35245/45 R 19 102 V M
+S XL A/S RSC
245/45 R 19 102 V M
+S XL RSC2.4 / 352.6 / 38Front:
245/45 R 19 98 Y RSC
Rear:
275/40 R 19 101 Y
RSC2.2 / 32
--
2.4 / 35Front:
245/40 R 20 99 Y XL
RSC
Rear:
275/35 R 20 102 Y XL
RSC2.4 / 35
--
2.6 / 38Front:
245/35 R 21 96 Y XL
RSC
Rear:
275/30 R 21 98 Y XL
RSC2.6 / 38
--
3.0 / 44Compact wheel:
T 135/80 R 18 104 MSpeed up to a max.
of 50 mph / 80 km/h
4.2 / 60535i xDrive, 550i xDriveTire sizePressure specifica‐
tions in bar/PSISpecifications in
bar/PSI with cold tires245/50 R 18 100 V M
+S A/S RSC
245/50 R 18 100 H M
+S RSC2.2 / 322.4 / 35245/45 R 19 102 V M
+S XL A/S RSC
245/45 R 19 102 V M
+S XL RSC2.4 / 352.6 / 38Front:
245/45 R 19 98 Y RSC
Rear:
275/40 R 19 101 Y
RSC2.4 / 35
--
2.4 / 35Front:
245/40 R 20 99 Y XL
RSC
Rear:
275/35 R 20 102 Y XL
RSC2.6 / 38
--
2.6 / 38Front:
245/35 R 21 96 Y XL
RSC
Rear:
275/30 R 21 98 Y XL
RSC2.8 / 41
--
3.0 / 44Compact wheel:
T 135/80 R 18 104 MSpeed up to a max.
of 50 mph / 80 km/h
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Tire inflation pressures at max.
speeds above 100 mph/160 km/h
Speeds above 100 mph/160 km/h
In order to drive at maximum speeds in
excess of 100 mph/160 km/h, please observe,
and, if necessary, adjust tire pressures for
speeds exceeding 100 mph/160 km/h from the
relevant table on the following pages. Other‐
wise tire damage and accidents could occur.◀
Tire inflation pressure values over
100 mph/160 km/h
535i, 550i
Without high-speed tuning feature
Tire sizePressure specifica‐
tions in bar/PSI
Specifications in
bar/PSI with cold tires
245/50 R 18 100 V M
+S A/S RSC
245/50 R 18 100 H M
+S RSC
2.3 / 332.8 / 41245/45 R 19 102 V M
+S XL A/S RSC
245/45 R 19 102 V M
+S XL RSC
2.7 / 393.2 / 46Front:
245/45 R 19 98 Y RSC
Rear:
275/40 R 19 101 Y
RSC
2.3 / 33
-
-
2.5 / 36
Front:
245/40 R 20 99 Y XL
RSC
Rear:
275/35 R 20 102 Y XL
RSC
2.5 / 36
-
-
2.8 / 41
Tire sizePressure specifica‐
tions in bar/PSI
Front:
245/35 R 21 96 Y XL
RSC
Rear:
275/30 R 21 98 Y XL
RSC
2.9 /42
-
-
3.2 / 46
Compact wheel:
T 135/80 R 18 104 M
Speed up to a max.
of 50 mph / 80 km/h
4.2 / 60
With high-speed tuning feature
Tire sizePressure specifica‐
tions in bar/PSI
Specifications in
bar/PSI with cold tires
245/50 R 18 100 H M
+S RSC
2.3 / 332.8 / 41245/45 R 19 102 V M
+S XL A/S RSC
2.7 / 393.2 / 46Front:
245/45 R 19 98 Y RSC
Rear:
275/40 R 19 101 Y
RSC
2.4 / 35
-
-
2.6 / 38
Front:
245/40 R 20 99 Y XL
RSC
Rear:
275/35 R 20 102 Y XL
RSC
2.6 / 38
-
-
2.8 / 41
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245/45 R 19 102 V M
+S XL RSC

Tire sizePressure specifica‐
tions in bar/PSIFront:
245/35 R 21 96 Y XL
RSC
Rear:
275/30 R 21 98 Y XL
RSC2.9 /42
--
3.3 / 48Compact wheel:
T 135/80 R 18 104 MSpeed up to a max.
of 50 mph / 80 km/h
4.2 / 60
535i xDrive, 550i xDrive
Without high-speed tuning feature
Tire sizePressure specifica‐
tions in bar/PSISpecifications in
bar/PSI with cold tires245/50 R 18 100 V M
+S A/S RSC
245/50 R 18 100 H M
+S RSC2.3 / 332.7 / 39245/45 R 19 102 V M
+S XL A/S RSC
245/45 R 19 102 V M
+S XL RSC2.5 / 362.9 /42Front:
245/45 R 19 98 Y RSC
Rear:
275/40 R 19 101 Y
RSC2.4 / 35
--
2.4 / 35Tire sizePressure specifica‐
tions in bar/PSIFront:
245/40 R 20 99 Y XL
RSC
Rear:
275/35 R 20 102 Y XL
RSC2.6 / 38
--
2.6 / 38Front:
245/35 R 21 96 Y XL
RSC
Rear:
275/30 R 21 98 Y XL
RSC2.8 / 41
--
3.0 / 44Compact wheel:
T 135/80 R 18 104 MSpeed up to a max.
of 50 mph / 80 km/h
4.2 / 60
With high-speed tuning feature
Tire sizePressure specifica‐
tions in bar/PSISpecifications in
bar/PSI with cold tires245/50 R 18 100 H M
+S RSC2.5 / 362.8 / 41245/45 R 19 102 V M
+S XL A/S RSC
245/45 R 19 102 V M
+S XL RSC2.8 / 413.2 / 46Front:
245/45 R 19 98 Y RSC
Rear:
275/40 R 19 101 Y
RSC2.5 / 36
--
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Tire sizePressure specifica‐
tions in bar/PSIFront:
245/40 R 20 99 Y XL
RSC
Rear:
275/35 R 20 102 Y XL
RSC2.8 / 41
--
2.8 / 41Front:
245/35 R 21 96 Y XL
RSC
Rear:
275/30 R 21 98 Y XL
RSC3.0 / 44
--
3.2 / 46Compact wheel:
T 135/80 R 18 104 MSpeed up to a max.
of 50 mph / 80 km/h
4.2 / 60
Tire identification marks
Tire size 245/45 R 18 96 Y
245: nominal width in mm
45: aspect ratio in %
R: radial tire code
18: rim diameter in inches
96: load rating, not for ZR tires
Y: speed rating, before the R on ZR tires
Speed letter
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
Tire Identification Number
DOT code: DOT xxxx xxx 1013
xxxx: manufacturer code for the tire brand
xxx: tire size and tire design
1013: tire age
Tires with DOT codes meet the guidelines of
the U.S. Department of Transportation.
Tire age
DOT … 1013: the tire was manufactured in the
10th week 2013.
Recommendation
Regardless of wear, replace tires at least every
6 years.
Uniform Tire Quality GradingQuality grades can be found where applicable
on the tire sidewall between tread shoulder
and maximum section width.
For example: Treadwear 200; Traction AA;
Temperature A
DOT Quality Grades Treadwear
Traction AA A B C
Temperature A B C
All passenger car tires must conform to Fed‐
eral Safety Requirements in addition to these
grades.
TreadwearThe 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. For example, 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, however, and may depart signifi‐
cantly from the norm due to variations in driv‐
ing habits, service practices and differences in
road characteristics and climate.Seite 205Wheels and tiresMobility205
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Traction
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.
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
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
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 re‐
quired by law.
Temperature grade for this tire
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.
If necessary, have the vehicle towed.◀
RSC – Run-flat tires
Run-flat tires, refer to page 209, are labeled
with a circular symbol containing the letters
RSC marked on the sidewall.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 in/3 mm.
There is an increased danger of hydroplaning if
the tread depth is less than 0.12 in/3 mm.
Winter tires
Do not drive with a tire tread depth of less than
0.16 in/4 mm.
Below a tread depth of 0.16 in/4 mm, tires are
less suitable for winter operation.
Minimum tread depth
Wear indicators are distributed around the
tire's circumference and have the legally re‐
quired minimum height of 0.063 in/1.6 mm.
They are marked on the side of the tire with
TWI, Tread Wear Indicator.
Tire damage
General information
Inspect your tires often for damage, foreign
objects lodged in the tread, and tread wear.
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Notes
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.
Indications of tire damage or other vehicle de‐
fects:▷Unusual vibrations during driving.▷Unusual handling such as a strong ten‐
dency to pull to the left or right.
Damage can, e. g., be caused by driving over
curbs, road damage, or similar things.
In case of tire damage
If there are indications of tire damage, re‐
duce your speed immediately and have the
wheels and tires checked right away; other‐
wise, there is the increased risk of an accident.
Drive carefully to the nearest service center. If
necessary, have the vehicle towed.
Otherwise, tire damage can be life-threatening
for vehicle occupants and other traffic partici‐
pants.◀
Repair of tire damage
For safety reasons, the manufacturer of
your vehicle recommends that you do not have
damaged tires repaired; they should be re‐
placed. Otherwise, damage can occur as a re‐
sult.◀
Changing wheels and tires
Mounting Information on mounting tires
Have mounting and balancing performed
only by a service center.
If this work is not carried out properly, there is
the danger of subsequent damage and related
safety hazards.◀
Wheel and tire combination
Information on the correct wheel-tire combina‐
tion and rim versions for your vehicle can be
obtained from your service center.
Incorrect wheel and tire combinations impair
the function of a variety of systems such as
ABS or DSC.
To maintain good handling and vehicle re‐
sponse, use only tires with a single tread con‐
figuration from a single manufacturer.
Following tire damage, have the original wheel
and tire combination remounted on the vehicle
as soon as possible.
Approved wheels and tires
The manufacturer of your vehicle recom‐
mends that you use only wheels and tires that
have been approved for your particular vehicle
model.
For example, despite having the same official
size ratings, variations can lead to body con‐
tact and with it, the risk of severe accidents.
The manufacturer of your vehicle cannot eval‐
uate non-approved wheels and tires to deter‐
mine if they are suited for use, and therefore
cannot ensure the operating safety of the vehi‐
cle if they are mounted.◀Seite 207Wheels and tiresMobility207
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Recommended tire brands
For each tire size, the manufacturer of your ve‐
hicle recommends certain tire brands. These
can be identified by a star on the tire sidewall.
With proper use, these tires meet the highest
standards for safety and handling.
New tires Due to technical factors associated with their
manufacture, tires do not achieve their full
traction potential until after an initial breaking-
in period.
Drive conservatively for the first
200 miles/300 km.
Retreaded tires
The manufacturer of your vehicle does not rec‐
ommend the use of retreaded tires.
Retreaded tires
Possibly substantial variations in the de‐
sign and age of the tire casing structures can
limit service life and have a negative impact on
road safety.◀
Winter tires
The manufacturer of your vehicle recommends
winter tires for winter roads or at temperatures
below +45 ℉/+7 ℃.
Although so-called all-season M+S tires do
provide better winter traction than summer
tires, they do not provide the same level of per‐
formance as winter tires.
Maximum speed of winter tires
If the maximum speed of the vehicle is higher
than the permissible speed for the winter tires,
then display a corresponding sign in the field
of vision. You can obtain this sign from the tire
specialist or from your service center.
Maximum speed for winter tires
Do not exceed the maximum speed for
the winter tires; otherwise, tire damage and ac‐
cidents can occur.◀
Run-flat tires If you are already using run-flat tires, for your
own safety you should replace them only with
the same kind. No spare tire is available in the
case of a flat tire. Your service center will be
glad to advise you.
Rotating wheels between axles The manufacturer of your vehicle advises
against switching wheels between the front
and rear axles.
This can impair the handling characteristics.
StorageStore wheels and tires in a cool, dry place with
as little exposure to light as possible.
Always protect tires against all contact with oil,
grease and fuels.
Do not exceed the maximum tire inflation pres‐
sure indicated on the side wall of the tire.Seite 208MobilityWheels and tires208
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Run-flat tires
Label
RSC label on the tire sidewall.
The wheels are composed of special rims and
tires that are self-supporting, to a limited de‐
gree.
The support of the sidewall allows the tire to
remain drivable to a restricted degree in the
event of a pressure loss.
Continued driving with a damaged tire, refer to
page 106.
Continued driving with a damaged tire, refer to
page 109.
Changing run-flat tires
For your own safety, only use run-flat tires. No
spare tire is available in the case of a flat tire.
Your service center will be glad to advise you.
Snow chains
Fine-link snow chains
Only certain types of fine-link snow chains
have been tested by the manufacturer of your
vehicle, classified as road-safe and recom‐
mended.
Consult your service center for more informa‐
tion.
Use Use only in pairs on the rear wheels, equipped
with the tires of the following size:
▷245/50 R 18.▷245/45 R 19.
Follow the chain manufacturer's instructions.
Make sure that the snow chains are always
sufficiently tight. Retighten as needed accord‐
ing to the chain manufacturer's instructions.
Do not initialize the Flat Tire Monitor after
mounting snow chains, as doing so may result
in incorrect readings.
Do not initialize the Tire Pressure Monitor after
mounting snow chains, as doing so may result
in incorrect readings.
When driving with snow chains, briefly activate
Dynamic Traction Control if necessary.
Maximum speed with snow chains Do not exceed a speed of 30 mph/50 km/h
when using snow chains.
Snow chain detection
The concept When using snow chains, settings should be
made via the iDrive for the snow chains being
applied.
The snow chain detection system supports
you by automatically showing the detected
state on the Control Display.
When snow chains are in use, the rear axle
steering of the Integral Active Steering is deac‐
tivated automatically.
At speeds above the maximum permitted
speed with snow chains of 30 mph/50 km/h,
the rear axle steering is activated again auto‐
matically.
Activating the status
1."Settings"2."Tire chains"3."Tire chains installed"Seite 209Wheels and tiresMobility209
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Automatic detectionIf functioning properly:▷Snow chains are mounted. The setting is
not activated
.
After you drive a short distance, a Check
Control message is shown and the state is
activated automatically.
Confirm the automatic activation.
▷Snow chains are not mounted. The setting
is activated
.
At speeds above 30 mph/50 km/h, a Check
Control message is displayed. Deactivate
the status manually.
If not functioning properly:
▷Snow chains are mounted. The setting is
not activated
.
A Check Control message is not displayed.
The automatic detection system is mal‐
functioning. Activate the status manually.
Activating/deactivating rear axle
steering
If the status indicating that snow chains are in
use is activated, the rear axle steering is deac‐
tivated automatically.
At speeds above 30 mph/50 km/h, the rear axle
steering is activated again, even though snow
chains are in use.
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