2010 BMW 550I SEDAN tires

Things to remember when driving
126 the road surface, ultimately undermining your
ability to steer and brake the vehicle.<
The risk of hydroplaning increases as the tread
depth of the tires decreases, refer also to Mini-
mum tire tread on page208.
Driving through water
Do not drive through water on the road if it
is deeper than 1 ft/30 cm, and then only at
walking speed at the most. Otherwise, the vehi-
cle's engine, the electrical systems and the
transmission may be damaged.<
Using parking brake on inclines
On inclines, do not hold the vehicle in
place for a long time by riding the clutch;
use the parking brake. Otherwise greater clutch
wear will result.<
Braking safely
Your BMW is equipped with ABS as a standard
feature. In situations that require it, it is best to
brake with full force. Since the vehicle maintains
steering responsiveness, you can still avoid
possible obstacles with a minimum of steering
effort.
Pulsation of the brake pedal, combined with
sounds from the hydraulic circuits, indicate that
ABS is in its active mode.
Do not drive with your foot resting on the
brake pedal. Even light but consistent
pedal pressure can lead to high temperatures,
brake wear and possibly even brake failure.<
Driving in wet conditions
When roads are wet or there is heavy rain,
briefly exert gentle pressure on the brake pedal
every few miles. Monitor traffic conditions to
ensure that this maneuver does not endanger
other road users. The heat generated in this
process helps dry the pads and rotors to ensure
that full braking efficiency will then be available
when you need it.
Hills
To prevent overheating and the resulting
reduced efficiency of the brake system, drive long or steep downhill gradients in the
gear in which the least braking is required. Even
light but consistent pressure on the brake can
lead to high temperatures, brake wear and pos-
sibly even brake failure.<
The braking effect of the engine can be further
increased by downshifting, if necessary all the
way down into first gear. This strategy helps
you avoid placing excessive loads on the brake
system. For information on downshifting in the
manual mode of the automatic transmission,
refer to page61.
Do not drive with the clutch depressed, in
idle or with the engine switched off, other-
wise there will be no engine braking action or
support of the braking force and steering.
Never allow floor mats, carpets or any other
objects to protrude into the area of movement
of the pedals and impair their operation.<
Corrosion on brake rotors
When the vehicle is driven only occasionally,
during extended periods when the vehicle is not
used at all, and in operating conditions where
brake applications are less frequent, there is an
increased tendency for corrosion to form on
rotors, while contaminants accumulate on the
brake pads. This occurs because the minimum
pressure which must be exerted by the pads
during brake applications to clean the rotors is
not reached.
Should corrosion form on the brake rotors, the
brakes will tend to respond with a pulsating
effect that even extended application will fail to
cure.
When vehicle is parked
Condensation forms in the air conditioner sys-
tem during operation, and then exits under the
vehicle. Traces of condensed water under the
vehicle are therefore normal.
Cargo loading
To avoid loading the tires beyond their
approved carrying capacity, never over-
load the vehicle. Overloading can lead to over-

Driving tips
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Mobility
heating and increases the rate at which damage
develops inside the tires. The ultimate result
can assume the form of a sudden blow out.<
Make sure that no fluids leak in the cargo
bay; otherwise the vehicle could be dam-
aged.<
Determining loading limit
1.Locate the following statement on your
vehicle's placard
*:
The combined weight of occupants
and cargo should never exceed
XXX lbs. or YYY kg, as otherwise the vehicle
may be damaged and unstable driving con-
ditions may result.<
2.Determine the combined weight of the
driver and passengers that will be riding in
your vehicle.
3.Subtract the combined weight of the driver
and passengers from XXX lbs. or YYY kg.
4.The resulting figure equals the available
amount of cargo and luggage load capacity.
For example, if the XXX amount equals
1,400 lbs. and there will be five 150-lb. pas-
sengers in your vehicle, the amount of avail-
able cargo and luggage load capacity is
650 lbs.:
1,400 lbs. minus 750 lbs. = 650 lbs.
5.Determine the combined weight of luggage
and cargo being loaded on the vehicle. That
weight may not safely exceed the available
cargo and luggage load capacity calculated
in step 4.
6.If your vehicle will be towing a trailer, part of
the load from your trailer will be transferred
to your vehicle. Consult the manual for
transporting a trailer to determine how this may reduce the available cargo and luggage
load capacity of your vehicle.
Load
The permissible load is the total of the weight of
occupants and cargo/luggage. The greater the
weight of occupants, the less cargo/luggage
can be transported.
Stowing cargo
>Load heavy cargo as far forward and as low
as possible, placing it directly behind the
rear backrest.
>Cover sharp edges and corners.
>For very heavy cargo when the rear seat is
not occupied, secure each safety belt in the
opposite buckle.

Mobility
This section helps you maintain your car's
mobility by supplying important information
on vital topics, including fuels and lubricants,
wheels and tires, service, maintenance and
breakdown assistance.
Mobility

Wheels and tires
202
Wheels and tires
Tire inflation pressure
Information for your safety
The condition of the tires and the maintenance
of the specified tire pressure are crucial not only
to the tire's service life, but also to driving com-
fort and most importantly, driving safety.
Checking pressure
Only check tire inflation pressure when the tires
are cold. This means after a maximum of
1.25 miles/2 km driving or when the vehicle has
been parked for at least 2 hours. When tires are
warm, the tire inflation pressure increases.
Check the tire inflation pressure regularly
and correct it as needed, even on the
compact tire
*: at least twice a month and before
starting long trips. Otherwise driving instability
or tire damage, and therefore accidents, can
result from incorrect tire inflation pressures.
Do not drive with depressurized, i.e., flat tires,
except run-flat tires. A flat tire will seriously
impair your vehicle's handling and braking
response. Attempts to drive on a flat tire can
lead to a loss of control over the vehicle.<
After correcting the tire inflation pressure,
reinitialize the Flat Tire Monitor, refer to
page89, or reset the Tire Pressure Monitor,
refer to page90.<
Pressure specifications
The tables below provide all the correct inflation
pressures for the specified tire sizes at ambient
temperature.
The inflation pressures apply to the tire
sizes and tire brands respectively
approved and recommended by BMW; a list of
these is available from your BMW center.<
For correct identification of the right tire infla-
tion pressure for your tires, observe the follow-
ing:
>Tire sizes of your vehicle>Load conditions
>Maximum allowable driving speed
Tire inflation pressures for speeds
up to 100 mph/160 km/h
For normal driving up to 100 mph/160 km/h,
adjust pressures to the respective tire inflation
pressures listed on the following pages in the
column Traveling speeds up to max. 100 mph/
160 km/h to achieve optimum driving comfort.
These pressure specifications can be found on
the door post when you open the driver's door.
The permissible top speed for these tire
inflation pressures is 100 mph/160 km/h.
Do not exceed this speed, otherwise tire dam-
age and accidents may result.<
Tire inflation pressures for 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. Oth-
erwise tire damage and accidents could
occur.<
Observe all national and local maximum speed
limits, otherwise violations of the law could
occur.

Mobility
203Reference
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528i
535i
Tire sizePressure specifications in psi/kPa
Compact wheel
*:
T 135/80 R 17 102 M61/420
Traveling speeds up
to max. of 100 mph/
160 km/hTraveling speeds including those exceed-
ing 100 mph/160 km/h
All pressure specifications
in the table are indicated in psi/
kilopascal with cold tires.
Cold = ambient temperature
245/45 R 17 95 W
245/45 R 17 99 V M+S XL32/220 33/230 32/220 33/230 35/240 42/290
225/50 R 17 94 V M+S
225/50 R 17 94 W
245/40 R 18 93 W
225/50 R 17 94 H M+S32/220 36/250 32/220 35/240 36/250 44/300
245/40 R 18 97 V M+S XL 32/220 38/260 32/220 38/260 38/260 45/310
Front: 245/40 R 18 93 W
Rear: 275/35R1895W32/220 33/230 32/220 33/230 36/250 42/290
Front: 245/35 R 19 93 Y XL
Rear: 275/30R1996YXL32/220 38/260 32/220 33/230 35/240 42/290
More details on the permissible load and weights can be found on page241.
Tire sizePressure specifications in psi/kPa
Compact wheel
*:
T 135/80 R 17 102 M61/420
Traveling speeds up
to max. of 100 mph/
160 km/hTraveling speeds including those exceed-
ing 100 mph/160 km/h
All pressure specifications
in the table are indicated in psi/
kilopascal with cold tires.
Cold = ambient temperature
245/45 R 17 95 W
225/55 R 16 95 H M+S
245/45 R 17 99 V M+S XL32/220 35/240 32/220 33/230 35/240 42/290
225/50 R 17 94 M+S W
225/50 R 17 94 W
225/50 R 17 94 H M+S32/220 36/250 32/220 35/240 38/260 45/310
245/40 R 18 93 W 32/220 38/260 32/220 35/240 38/260 45/310

Wheels and tires
204
528i xDrive
245/40 R 18 97 V M+S XL 32/220 38/260 32/220 38/260 39/270 46/320
Front: 245/40 R 18 93 W
Rear: 275/35 R 18 95 W32/220 35/240 32/220 33/230 38/260 42/290
Front: 245/35 R 19 93 Y XL
Rear: 275/30 R 19 96 Y XL33/230 39/270 32/220 33/230 35/240 42/290
More details on the permissible load and weights can be found on page241.
Tire sizePressure specifications in psi/kPa
Tire sizePressure specifications in psi/kPa
Compact wheel
*:
T 135/80 R 17 102 M61/420
Traveling speeds up
to max. of 100 mph/
160 km/hTraveling speeds including those exceed-
ing 100 mph/160 km/h
All pressure specifications
in the table are indicated in psi/
kilopascal with cold tires.
Cold = ambient temperature
245/45 R 17 95 W
245/45 R 17 99 V M+S XL32/220 35/240 32/220 33/230 35/240 42/290
225/50 R 17 94 V M+S
225/50 R 17 94 W
225/50 R 17 94 H M+S
245/40 R 18 93 W
245/40 R 18 97 V M+S XL32/220 36/250 32/220 36/250 38/260 45/310
Front: 245/40 R 18 93 W
Rear: 275/35 R 18 95 W32/220 35/240 32/220 33/230 38/260 42/290
More details on the permissible load and weights can be found on page241.

Mobility
205Reference
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Entertainment
535i xDrive
535i xDrive Touring
Tire sizePressure specifications in psi/kPa
Compact wheel
*:
T 135/80 R 17 102 M61/420
Traveling speeds up
to max. of 100 mph/
160 km/hTraveling speeds including those exceed-
ing 100 mph/160 km/h
All pressure specifications
in the table are indicated in psi/
kilopascal with cold tires.
Cold = ambient temperature
245/45 R 17 95 W
245/45 R 17 99 V M+S XL32/220 35/240 32/220 33/230 35/240 42/290
225/50 R 17 94 W M+S
225/50 R 17 94 W
225/50 R 17 94 H M+S32/220 36/250 32/220 36/250 38/260 45/310
245/40 R 18 93 W 33/230 36/250 33/230 36/250 38/260 45/310
245/40 R 18 97 V M+S XL 35/240 38/260 35/240 38/260 38/260 45/310
Front: 245/40 R 18 93 W
Rear: 275/35R1895W32/230 35/240 33/230 33/230 38/260 42/290
More details on the permissible load and weights can be found on page241.
Tire sizePressure specifications in psi/kPa
Compact wheel
*:
T 135/80 R 17 102 M61/420
Traveling speeds up
to max. of 100 mph/
160 km/hTraveling speeds including those exceed-
ing 100 mph/160 km/h
All pressure specifications
in the table are indicated in psi/
kilopascal with cold tires.
Cold = ambient temperature
225/50 R 17 94 W M+S
225/50 R 17 94 W
245/45 R 17 95 W
225/50 R 17 94 H M+S
245/45 R 17 99 V M+S XL33/230 41/280 33/230 41/280 38/260 45/310
245/40 R 18 93 Y 32/220 39/270 32/220 38/260 35/240 42/290
245/40 R 18 97 V M+S XL 36/250 44/300 36/250 44/300 41/280 48/330
More details on the permissible load and weights can be found on page241.

Wheels and tires
206
550i
Tire identification marks
Knowledge of the labeling on the side of the tire
makes it easier to identify and choose the right
tires.
Tire sizeSpeed letter
Q = up to 100 mph/160 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
Tire Identification Number
Tires with DOT codes meet the guidelines of
the U.S. Department of Transportation.
DOT code:
Tire sizePressure specifications in psi/kPa
Compact wheel
*:
T 135/80 R 17 102 M61/420
Traveling speeds up
to max. of 100 mph/
160 km/hTraveling speeds including those exceed-
ing 100 mph/160 km/h
All pressure specifications
in the table are indicated in psi/
kilopascal with cold tires.
Cold = ambient temperature
245/40 R 18 93 Y 32/220 38/260 32/220 35/240 33/230 41/280
245/45 R 17 95 W
245/45 R 17 99 V M+S XL
225/50 R 17 94 H M+S
225/50 R 17 94 W32/220 38/260 32/220 38/260 38/260 45/310
245/40 R 18 97 V M+S XL 33/230 39/270 33/230 39/270 39/270 46/320
Front: 245/40 R 18 93 Y
Rear: 275/35 R 18 95 Y32/220 35/240 32/220 32/220 33/230 38/260
Front: 245/35 R 19 93 Y XL
Rear: 275/30 R 19 96 Y XL35/240 39/270 33/230 38/260 38/260 45/310
More details on the permissible load and weights can be found on page241.
For instance
Nominal width in mm
Aspect ratio in Ξ
Radial belt construction
Rim diameter in inches
Load rating,
(not on ZR tires)
Speed code letter (in
front of the R on ZR tires)225/50 R1794 W