2016 SMART FORTWO tires

(Ypage 126) and the indicator and warning
lamps in the instrument cluster in the "Tires" section (
Ypage 139).
Restarting the tire pressure monitor
When you restart the tire pressure monitor,
all existing warning messages are deleted
and the warning lamps go out. The monitor
uses the currently set tire pressures as the
reference values for monitoring. In most
cases, the tire pressure monitor will auto-
matically detect the new reference values
after you have changed the tire pressure.
However, you can also define reference values
manually as described here. The tire pres-
sure monitor then monitors the new tire pres-
sure values.
XSet the tire pressure to the value recom-
mended for the corresponding driving sit-
uation on the Tire and Loading Information
placard on the B-pillar on the driver's side
(
Ypage 180).
Additional tire pressure values for dif-
ferent loads can also be found on the tire
pressure table on the inside of the fuel
filler flap (
Ypage 180).
XMake sure that the tire pressure is correct on all four wheels.
On-board computer with a color display
XTo restart the tire pressure monitor: press
the 0063 or0064 button on the steering
wheel to select the Settings
menu and
press 0076on the steering wheel to con-
firm.
XPress the 0063or0064 button to select the
TirePressureMonitorsubmenu and con-
firm with 0076.
The Tire Pressure Monitor Use Cur‐
rentPressuresAsNewReferenceVal‐ues?message appears in the display.
If you wish to confirm the restart:
XPress the 0063or0064 button to select yesand press the0076button to confirm.
The Tire Pressure Monitor Restarted
message appears in the display.
XPress 0076to confirm.
After a short while, the message is also
hidden without pressing the 0076button.
After driving for a few minutes, the system
checks whether the current tire pressures are within the specified range. The new
tire pressures are then accepted as refer-
ence values and monitored.
iIf the
Tire Pressure Monitor Restar‐tedmessage does not appear after approx-
imately 5 seconds, the restart was not suc-
cessful. If this occurs, repeat the restart.
If you wish to cancel the restart:
XPress the 0063or0064 button to select noand press the0076button to confirm.
The tire pressure values stored at the last
restart will continue to be monitored.
Radio type approval for the tire pressure
monitor
CountryRadio type approval number
USAFCC ID: MRXMW2433A
FCC ID: MRXGG4
FCC ID: MRXMC34MA4
CanadaIC: 2546A-MW2433A
IC: 2546A-GG4
IC: 2546A-MC34MA4
Loading the vehicle
Instruction labels for tires and loads
GWARNING
Overloaded tires can overheat, causing a
blowout. Overloaded tires can also impair
the steering and driving characteristics
and lead to brake failure. There is a risk of
accident.
Observe the load rating of the tires. The
load rating must be at least half of the GAWR
of your vehicle. Never overload the tires by exceeding the maximum load.
Two instruction labels on your vehicle show
the maximum possible load.
(1) The Tire and Loading Information plac- ard is on the B-pillar on the driver's
side. The Tire and Loading Information
placard shows the maximum permissible
number of occupants and the maximum
permissible vehicle load. It also con-
Loading the vehicle185
>> Wheels and tires.
Z

tains details of the tire sizes and corre-
sponding pressures for tires mounted at
the factory.
(2) The vehicle identification plate is on the B-pillar on the driver's side. The
vehicle identification plate informs you
of the gross vehicle weight rating. It is
made up of the vehicle weight, all vehicle
occupants, the fuel and the cargo. You can
also find information about the maximum
gross axle weight rating on the front and
rear axle.
The maximum gross axle weight rating is
the maximum weight that can be carried
by one axle (front or rear axle). Never
exceed the maximum load or the maximum gross axle weight rating for the front or
rear axle.
0043B-pillar, driver's side
Maximum permissible gross vehicle
weight rating
XSpecification for maximum gross vehicle
weight 0043is listed in the Tire and Loading
Information placard: "The combined
weight of occupants and cargo should never
exceed XXX kilograms or XXX lbs." The gross weight of all vehicle occupants,
load and luggage must not exceed the speci-
fied value.
iThe specifications shown on the Tire and
Loading Information placard in the illus-
tration are examples. The maximum per-
missible gross vehicle weight rating is
vehicle-specific and may differ from that
in the illustration. You can find the valid
maximum permissible gross vehicle weight
rating for your vehicle on the Tire and
Loading Information placard.
Number of seats
Maximum number of seats 0043indicates the
maximum number of occupants allowed to
travel in the vehicle. This information can be
found on the Tire and Loading Information
placard.
iThe specifications shown on the Tire and
Loading Information placard in the illus-
tration are examples. The number of seats
is vehicle-specific and can differ from the
details shown. The number of seats in your
vehicle can be found on the Tire and Load-
ing Information placard.
Determining the correct load limit
Step-by-step instructions
The following steps have been developed as
required of all manufacturers under Title 49,
Code of U.S. Federal Regulations, Part 575
pursuant to the "National Traffic and Motor
Vehicle Safety Act of 1966".
XStep 1: Locate the statement "The combined
weight of occupants and cargo should never
186Loading the vehicle
>> Wheels and tires.

exceed XXX kg or XXX lbs." on your vehicle’s
Tire and Loading Information placard.
XStep 2:Determine the combined weight of
the driver and passengers that will be rid-
ing in your vehicle.
XStep 3: Subtract the combined weight of the
driver and passengers from XXX kilograms
or XXX lbs.
XStep 4: The resulting figure equals the
available amount of cargo and luggage load capacity. For example: at a sum “XXX” of
1400 lbs and five occupants each weighing
150 lbs, the amount of available cargo and
luggage load capacity is 650 lbs (1400 - 750
(5 x 150) = 650 lbs).
XStep 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 capa-
city calculated in step 4.
Loading the vehicle187
>> Wheels and tires.
Z

Example: steps 1 to 3
The following table shows examples on how to calculate total and cargo load capacities with
varying seating configurations and number and size of occupants. The following examples use
a load limit of 1500 lbs (680 kg).This is for illustration purposes only. Make sure you are using
the actual load limit for your vehicle stated on your vehicle's Tire and Loading Information
placard (
Ypage 185).
The greater the combined weight of the occupants, the lower the maximum luggage load.
Step 1
Example 1Example 2Example 3
Combined maximum
weight of occupants and
cargo (data from the
Tire and Loading Infor-
mation placard)1500 lbs (680 kg)1500 lbs (680 kg)1500 lbs (680 kg)
Step 2
Example 1Example 2Example 3
Number of people in the
vehicle (driver and
occupants)531
Distribution of the
occupantsFront: 2
Rear: 3Front: 1
Rear: 2Front: 1
Weight of the occupantsOccupant 1: 150 lbs
(68 kg)
Occupant 2: 180 lbs
(82 kg)
Occupant 3: 160 lbs
(73 kg)
Occupant 4: 140 lbs
(63 kg)
Occupant 5: 120 lbs
(54 kg)Occupant 1: 200 lbs
(91 kg)
Occupant 2: 190 lbs
(86 kg)
Occupant 3: 150 lbs
(68 kg)Occupant 1: 150 lbs
(68 kg)
Gross weight of all
occupants750 lbs (340 kg)540 lbs (245 kg)150 lbs (68 kg)
188Loading the vehicle
>> Wheels and tires.

Step 3
Example 1Example 2Example 3
Permissible load (max-
imum gross vehicle
weight rating from the
Tire and Loading Infor-
mation placard minus
the gross weight of all
occupants)1500 lbs (680 kg)
00F8750 lbs (340 kg) =
750 lbs (340 kg)1500 lbs (680 kg)
00F8540 lbs (245 kg) =
960 lbs (435 kg)1500 lbs (680 kg)
00F8150 lbs (68 kg) =
1350 lbs (612 kg)
Vehicle identification plate
Even if you have calculated the total cargo
carefully, you should still make sure that the
gross vehicle weight rating and the gross
axle weight rating are not exceeded. Details
can be found on the vehicle identification
plate on the B-pillar on the driver's side of
the vehicle (
Ypage 185).
Permissible gross vehicle weight: the gross
weight of the vehicle, all passengers, load
and trailer load/noseweight (if applicable)
must not exceed the permissible gross vehi-
cle weight.
Gross axle weight rating: the maximum per-
missible weight that can be carried by one
axle (front or rear axle).
To ensure that your vehicle does not exceed
the maximum permissible values (gross vehi-
cle weight and maximum gross axle weight
rating), have your loaded vehicle (including
driver, occupants, cargo, and full trailer
load if applicable) weighed on a suitable
vehicle weighbridge.
All about wheels and tires
Uniform Tire Quality Grading Stand-
ards
Overview of Tire Quality Grading Stand-
ards
Uniform Tire Quality Grading Standards are
U.S. government specifications. Their pur-
pose is to provide drivers with uniform reli-
able information on tire performance data.
Tire manufacturers have to grade tires using
three performance factors: 0043tread wear
grade, 0044traction grade and 0087temperature
grade. These regulations do not apply to Can-
ada. Nevertheless, all tires sold in North
America are provided with the corresponding
quality grading markings on the sidewall of
the tire.
Quality grades can be found, where applica-
ble, on the tire sidewall between the tread
shoulder and maximum tire width.
Example:
RTreadwear grade: 200
RTraction grade:AA
RTemperature grade: A
All about wheels and tires189
>> Wheels and tires.
Z

All passenger car tires must conform to the
statutory safety requirements in addition to
these grades.
iThe actual values for tires are vehicle-
specific and may deviate from the values in
the illustration.
Treadwear
The treadwear grade is a comparative rating
based on the wear rate of the tire when tested under controlled conditions on a specified
U.S. government course. For example, a tire
graded 150 would wear one and one-half times
as well on the government test track 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
characteristics and climate conditions.
Traction
GWARNING
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.
!Avoid wheelspin. This can lead to damage
to the drive train.
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 safe speed on a wet, snow covered or icy
road is always lower than on dry road surfa-
ces.
You should pay special attention to road con-
ditions when temperatures are around freez-
ing point.
smart recommends a minimum tread depth of
00CF in (4 mm) on all four winter tires. Observe
the legally required minimum tire tread
depth (
Ypage 178). Winter tires can reduce
the braking distance on snow-covered surfa- ces in comparison with summer tires. The
braking distance is still much further than on
surfaces that are not icy or covered with snow.
Take appropriate care when driving.
Further information on winter tires (M+S
tires) (
Ypage 179).
Temperature
GWARNING
The temperature grade for this tire is
established for a tire that is properly
inflated and not overloaded. Excessive
speed, underinflation, or excessive load-
ing, either separately or in combination,
can cause excessive heat build-up and pos- sible tire failure.
The temperature grades are A (the highest), B
and C. They represent the tire's resistance to
the generation of heat and its ability to dis-
sipate heat when tested under controlled con-
ditions 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 car tires must meet under the
Federal Motor Vehicle Safety Standard No.
109. Grades B and A represent higher levels of
performance on the laboratory test wheel than
the minimum required by law.
190All about wheels and tires
>> Wheels and tires.

Tire labeling
Overview of tire labeling
0043Uniform Tire Quality Grading Standard
(Ypage 194)
0044DOT, Tire Identification Number
(Ypage 193)
0087Maximum tire load (Ypage 193)
0085Maximum tire pressure (Ypage 182)
0083Manufacturer
0084Tire material (Ypage 194)
006BTire size designation, load-bearing
capacity and speed rating (Ypage 191)
006CLoad index (Ypage 193)
006DTire name
The markings described above are on the tire
in addition to the tire name (sales designa-
tion) and the manufacturer's name.
iTire data is vehicle-specific and may
deviate from the data in the example.
Tire size designation, load-bearing
capacity and speed rating
GWARNING
Exceeding the stated tire load-bearing
capacity and the approved maximum speed
could lead to tire damage or the tire burst- ing. There is a risk of accident.
Therefore, only use tire types and sizes
approved for your vehicle model. Observe
the tire load rating and speed rating
required for your vehicle.
0043Tire width
0044Nominal aspect ratio in %
0087Tire code
0085Rim diameter
0083Load bearing index
0084Speed rating
General: depending on the manufacturer's
standards, the size imprinted in the tire wall may not contain any letters or may contain one
letter that precedes the size description.
If there is no letter preceding the size
description (as shown above): these are
passenger vehicle tires according to Euro-
pean manufacturing standards.
If "P" precedes the size description: these
are passenger vehicle tires according to U.S.
manufacturing standards.
If "LT" precedes the size description: these
are light truck tires according to U.S. man-
ufacturing standards.
If "T" precedes the size description: compact
emergency wheels with high tire pressure
that are only designed for temporary use in an
emergency.
Tire width: tire width0043shows the nominal
tire width in millimeters.
Height-width ratio: aspect ratio0044is the
size ratio between the tire height and tire
width and is shown in percent. The aspect
ratio is calculated by dividing the tire width
by the tire height.
Tire code: tire code0087specifies the tire
type. "R" represents radial tires; "D" repre-
sents diagonal tires; "B" represents diago-
nal radial tires.
All about wheels and tires191
>> Wheels and tires.
Z

Optionally, tires with a maximum speed of
over 149 mph (240 km/h) may have "ZR" in the
size description, depending on the manufac-
turer (e.g. 245/40 ZR 18).
Rim diameter:rim diameter0085is the diam-
eter of the bead seat, not the diameter of the
rim flange. The rim diameter is specified in
inches (in).
Load-bearing index: load-bearing index0083
is a numerical code that specifies the maxi-
mum load-bearing capacity of a tire.
Do not overload the tires by exceeding the
specified load limit. The maximum permis-
sible load can be found on the vehicle's Tire
and Loading Information placard on the
B-pillar on the driver's side (
Ypage 185).
Example:
Load-bearing index 91 indicates a maximum
load of 1,356 lb (615 kg) that the tires can bear.
For further information on the maximum tire
load in kilograms and lbs, see (
Ypage 193).
For further information on the load bearing
index, see "Load index" (
Ypage 193).
Speed rating: speed rating0084specifies the
approved maximum speed of the tire.
iTire data is vehicle-specific and may
deviate from the data in the example.
Regardless of the speed rating, always
observe the speed limits. Drive carefully and
adapt your driving style to the traffic con-
ditions.
Summer tires
IndexSpeed rating
Qup to 100 mph (160 km/h)
Rup to 106 mph (170 km/h)
Sup to 112 mph (180 km/h)
Tup to 118 mph (190 km/h)
Hup to 130 mph (210 km/h)
Vup to 149 mph (240 km/h)
Wup to 168 mph (270 km/h)
Yup to 186 mph (300 km/h)
ZR...Yup to 186 mph (300 km/h)
IndexSpeed rating
ZR...(..Y)over 186 mph (300 km/h)
ZRover 149 mph (240 km/h)
ROptionally, tires with a maximum speed of
over 149 mph (240 km/h) may have "ZR" in the size description, depending on the manu-
facturer (e.g. 245/40 ZR18).
The service specification is made up of
load-bearing index 0083and speed rating
0084.
RIf the size description of your tire
includes "ZR" and there are no service
specifications, ask the tire manufacturer
in order to find out the maximum speed.
If a service specification is available, the maximum speed is limited according to the
speed rating in the service specification.
Example: 245/40 ZR18 97 Y.In this example,
"97 Y" is the service specification. The
letter "Y" represents the speed rating. The
maximum speed of the tire is limited to
186 mph (300 km/h).
RThe size description for all tires with
maximum speeds of over 186 mph (300 km/h)
must include "ZR", andthe service speci-
fication must be given in parentheses.
Example: 275/40 ZR 18 (99 Y). Speed rating
"(Y)" indicates that the maximum speed of
the tire is over 186 mph (300 km/h). Ask the
tire manufacturer about the maximum
speed.
All-weather tires and winter tires
IndexSpeed rating
Q M+S2up to 100 mph (160 km/h)
T M+S2up to 118 mph (190 km/h)
H M+S2up to 130 mph (210 km/h)
V M+S2up to 149 mph (240 km/h)
iNot all tires with the M+S marking pro-
vide the driving characteristics of winter
tires. In addition to the M+S marking, win-
ter tires also have the 004Dsnowflake sym-
bol on the tire wall. Tires with this mark-
ing fulfill the requirements of the Rubber
Manufacturers Association (RMA) and the
2Or M+S 004Dfor winter tires.
192All about wheels and tires
>> Wheels and tires.