tire size BMW 650I COUPE&CONVERTIBLE 2006 Owners Manual

Wheels and tires
188
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: 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.<
After correcting the tire inflation pressure,
reinitialize the Flat Tire Monitor, refer to
page88, 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 for your vehicle
>Load conditions
>Maximum allowable driving speed
Tire inflation pressures for driving
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 for traveling speeds up to a max. of
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 driving
above 100 mph/160 km/h
In order to drive at maximum speeds in
excess of 100 mph/160 km/h, please
note the tire pressures for speeds exceeding
100 mph/160 km/h listed in the relevant column
of the table on the following pages and adjust
your tire inflation pressures as needed. Other-
wise, tire damage and accidents could occur.<
Observe all national and local maximum speed
limits, otherwise violations of the law could
occur.

Mobility
189Reference
At a glance
Controls
Driving tips
Communications
Navigation
Entertainment
Tire inflation pressures for the 650i
Coupe
Tire inflation pressures for the 650i Convertible
Tire sizePressure specifications in psi/kPa
Traveling speeds
up to max. of
100 mph/160 km/hTraveling speeds
including those exceeding
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 18 96 V M+S
245/50 R 17 99 H M+S30/210 33/230 30/210 33/230 33/230 39/270
Front: 245/45 R 18 96 W
Rear: 275/40R1899W30/210 33/230 30/210 33/230 33/230 39/270
Front: 245/40 R 19 94 W
Rear: 275/35R1996W30/210 33/230 30/210 33/230 33/230 39/270
Front: 245/35 R 20 91 W
Rear: 275/30R2093Y30/210 33/230 30/210 33/230 33/230 39/270
More details on the permissible load and weights can be found on page217.
Tire sizePressure specifications in psi/kPa
Traveling speeds
up to max. of
100 mph/160 km/hTraveling speeds
including those exceeding
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 18 96 V M+S
245/50 R 17 99 H M+S32/220 38/260 32/220 38/260 39/270 46/320
Front: 245/45 R 18 96 W
Rear: 275/40R1899W32/220 38/260 32/220 38/260 39/270 46/320
Front: 245/40 R 19 94 W
Rear: 275/35R1996W32/220 38/260 32/220 38/260 39/270 46/320
Front: 245/35 R 20 91 W
Rear: 275/30R2093Y32/220 39/270 32/220 38/260 39/270 46/320
More details on the permissible load and weights can be found on page217.

Wheels and tires
190
Tire identification marks
Knowledge of the labeling on the side of the tire
makes it easier to identify and choose the right
tires.
Tire size
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
Tires with DOT codes meet the guidelines of
the U.S. Department of Transportation.
DOT code:
Tire age
The tire's date of manufacture is indicated on
the sidewall:
DOT ... 0806 indicates that a tire was manufac-
tured in week 8 of the year 2006.
BMW recommends replacing all tires at least
every 6 years, even if some tires may last for
10 years.
Uniform Tire Quality Grading
Quality grades can be found where applicable
on the tire sidewall between tread shoulder and
maximum section width. For example:
Tread wear 200 Traction AA
Temperature A
DOT Quality Grades
Tread wear
Traction AA A B C
Temperature A B C
All passenger car tires must conform to
Federal Safety Requirements in addition
to these grades.<
Tread wear
The tread wear 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, 1γ, times as well on the govern-
ment course as a tire graded 100. The relative
performance of tires depends upon the actual
conditions of their use, however, and may
depart significantly from the norm due to varia-
tions in driving habits, service practices and dif-
ferences in road characteristics and climate.
Traction
The traction grades, from highest to lowest, are
AA, A, B, and C.
These grades represent the tire's ability to stop
on wet pavement as measured under controlled
conditions on specified government test sur-
faces 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, cor-
nering, hydroplaning, or peak traction charac-
teristics.<
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 e.g.
Nominal width in mm
Aspect ratio in Ξ
Belted construction – radial
Rim diameter in inches
Carrying capacity ID-code
(not in ZR tires)
Speed code letter
(in ZR tires before the R)
245/45 R 18 96 W
e.g.
Manufacturer code
for tire make
Tire size and tire design
Tire ageDOT xxxx xxx 0806

Wheels and tires
192
Run-flat tires
You will recognize run-flat tires by the circular
symbol containing the letters RSC on the side
of the tire.
Run-flat tires consist of self-contained tires and
special rims. The sidewall reinforcement
ensures that the tire retains some residual
safety in the event of pressure drop and driving
remains possible to a restricted degree.
To continue driving with a damaged tire:
>With Flat Tire Monitor, refer to Indication of
a flat tire page89
>With Tire Pressure Monitor, refer to Mes-
sage with low tire inflation pressure page91
New wheels and tires
Only have new wheels and tires mounted
by a BMW center or a repair shop that
works in accordance with BMW guidelines and
uses appropriately trained personnel. If this
work is performed inexpertly, there is a danger
of damage and associated safety risks. Make
sure that the new wheels are balanced.<
Retreaded tires
BMW does not recommend the use of
retreaded tires; otherwise, driving safety
may be reduced. Potentially substantial varia-
tions in the design and the age of the carcasses
can result in a reduced service life.<
The right wheels and tires
BMW recommends that you use only
wheel and tire combinations that BMW
has tested and approved for your particular vehicle. Variations in factors such as manufac-
turing tolerances mean that even wheels and
tires with identical official size ratings could
actually have different dimensions than the
approved units – these differences could lead to
body contact, and with it the risk of severe acci-
dents. If non-approved wheels and tires are
used, BMW cannot evaluate their suitability,
and therefore cannot be held liable for driving
safety.<
You can find out the right wheel-tire combina-
tion from your BMW center.
The right wheel-and-tire combination is
another vital factor in ensuring reliable opera-
tion of various vehicle systems such as ABS
and DSC.
To maintain good handling and vehicle
response, use only tires of a single tread config-
uration from a single manufacturer. After a tire is
damaged, always remember to have the original
wheel and tire combination remounted on the
vehicle as soon as possible.
Wheels with electronics for
TPM Tire Pressure Monitor
When mounting new tires or converting from
summer to winter tires or vice versa, only use
wheels with TPM electronics, as otherwise the
Tire Pressure Monitor cannot detect a flat tire,
refer to page89. Your BMW center will be
happy to advise you on this subject.
Recommended tire brands
BMW recommends particular tire brands for
each tire size. You can recognize these from the
clearly visible BMW marking on the tire sidewall.

Mobility
193Reference
At a glance
Controls
Driving tips
Communications
Navigation
Entertainment
With proper use, these tires meet the highest
standards for safety and handling characteris-
tics.
Run-flat tires
When installing new tires or when changing
from summer tires to winter tires, for your own
safety, use run-flat tires. No spare wheel is pro-
vided in the event of a flat. Your BMW center will
be glad to advise you.
For safety reasons, BMW recommends
that you do not have damaged run-flat
tires repaired; they should be replaced.<
Special characteristics of winter tires
BMW recommends winter tires for use in cold
winter driving conditions. Although all-season
M+S tires provide better winter traction than
summer tires, they generally fail to provide the
same levels of cold-weather performance as
winter tires.
Watch speed
Always observe the maximum permissi-
ble speed for the winter tires, otherwise
tire damage may occur, which can result in acci-
dents.<
Storage
Always store 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 pressure indicated on the side wall
of the tire.
Snow chains*
BMW only tests certain fine-link snow chains,
classifies them as road-safe and recommends
them. Consult your BMW center for more infor-
mation.
These snow chains are approved exclusively for
use in pairs on the rear wheels with the tire size:
>245/50 R 17 Y
>245/45 R 18 Y
Observe the manufacturer's instructions when
mounting snow chains. Do not exceed a speed
of 30 mph/50 km/h with the chains mounted.
Do not initialize the Flat Tire Monitor after
installing snow chains as this could cause
the Flat Tire Monitor to malfunction.
When driving with snow chains, it may be prac-
tical to briefly activate DTC, refer to page87.<

Everything from A to Z
236 Storing current position132
Storing radio stations150
Storing sitting position, refer
to Seat, mirror and steering
wheel memory49
Storing tires193
Straps, refer to Loading121
"Street" for destination
entry127
Summer tires, refer to Wheels
and tires188
"Surround Settings", adjust
the sound146
SW, waveband148
Switches, refer to Cockpit10
Switching between high
beams and low beams,
automatic, refer to High-
beam assistant102
Switching off tilt alarm
sensor36
Switching on
– audio144
– CD changer144
– CD player144
– radio144
Switching the cooling function
on and off106
Swiveling headlamps, refer to
Adaptive Head Light101
Symbols4
– indicator and warning
lamps13
T
Tachometer74
Tail lamps203
– replacing bulbs203
Tank capacity
– also refer to Filling
capacities217
– fuel tank capacity186
Target cursor for
navigation130
Technical alterations, refer to
For your own safety6
Technical data214Telematic, refer to
TeleService,
BMW Assist179
Telephone, refer to Mobile
phone166
Telephone, refer to separate
operating instructions
"Telephone list"54
TeleService179
– enabling179
– services offered180
Temperature
– adjusting in upper body
region106
– adjusting with automatic
climate control105
– of coolant, refer to Coolant
temperature74
Temperature display
– changing units of
measure84
– outside temperature74
– temperature warning74
Temperature gauge, engine
oil75
Temperature warning74
Tempomat, refer to Cruise
control66
"Terminate services"182
"Text language"84
"Theater", refer to Tone
control146
The individual vehicle5
Tie-down points, refer to
Securing cargo121
Tilting down passenger-side
exterior mirror53
"Time"82
"Time format"83
Timer, refer to Preselecting
activation time108
"Timer 1" for parked car
ventilation109
"Timer 2" for parked car
ventilation109
Tire inflation pressures188
Tire pressure loss89,90
Tire Pressure Monitor
TPM89Tire Quality Grading190
Tires
– age190
– air loss89,91
– breaking-in118
– condition191
– damage191
– inflation pressure188
– minimum tread depth191
– monitoring inflation
pressure, refer to Flat Tire
Monitor88
– new wheels and tires192
– pressure monitoring, refer to
Tire Pressure Monitor89
– replacing192
– retreaded tires192
– run-flat tires192
– size189
– size, refer to The right
wheels and tires192
– wear indicators191
– wheel/tire combination192
– winter tires193
Tires with run-flat properties,
refer to Run-flat tires192
"Tone"145
Tone dialing method174
Tone in audio mode
– adjusting145
– middle setting147
Tone on locking/unlocking31
Tools, refer to Onboard tool
kit201
Top42
"Top 8" for mobile phone171
Torque, refer to Engine
specifications214
Touch tone dialing, refer to
Tone dialing method174
Tow fitting208
Towing208
– tow fitting208
"Town / City" for destination
entry126
Tow-starting208,210
"TPM"90