2020 Ram ProMaster City tire size

280 SERVICING AND MAINTENANCE
Tread Wear Indicators
Tread wear indicators are in the original equipment tires to
help you in determining when your tires should be replaced.
These indicators are molded into the bottom of the tread
grooves. They will appear as bands when the tread depth
becomes a 1/16 of an inch (1.6 mm). When the tread is worn
to the tread wear indicators, the tire should be replaced.
Refer to “Replacement Tires” in this section for further infor-
mation.
Life Of Tire
The service life of a tire is dependent upon varying factors
including, but not limited to:
• Driving style.
• Tire pressure - Improper cold tire inflation pressures can cause uneven wear patterns to develop across the tire
tread. These abnormal wear patterns will reduce tread life,
resulting in the need for earlier tire replacement.
• Distance driven.
• Performance tires, tires with a speed rating of V or higher, and Summer tires typically have a reduced tread life. Rota -
tion of these tires per the vehicle scheduled maintenance is
highly recommended. NOTE:
Wheel Valve Stem must be replaced as well when installing
new tires due to wear and tear in existing tires.
Keep dismounted tires in a cool, dry place with as little expo
-
sure to light as possible. Protect tires from contact with oil,
grease, and gasoline.
Replacement Tires
The tires on your new vehicle provide a balance of many
characteristics. They should be inspected regularly for wear
and correct cold tire inflation pressures. The manufacturer
strongly recommends that you use tires equivalent to the
originals in size, quality and performance when replacement
is needed. Refer to the paragraph on “Tread Wear Indica -
tors” in this section. Refer to the Tire and Loading Informa -WARNING!
Tires and the spare tire should be replaced after six
years, regardless of the remaining tread. Failure to follow
this warning can result in sudden tire failure. You could
lose control and have a collision resulting in serious
injury or death.
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SERVICING AND MAINTENANCE 281
tion placard or the Vehicle Certification Label for the size
designation of your tire. The Load Index and Speed Symbol
for your tire will be found on the original equipment tire
sidewall.
See the Tire Sizing Chart example found in the “Tire Safety
Information” section of this manual for more information
relating to the Load Index and Speed Symbol of a tire.
It is recommended to replace the two front tires or two rear
tires as a pair. Replacing just one tire can seriously affect
your vehicle’s handling. If you ever replace a wheel, make
sure that the wheel’s specifications match those of the orig-
inal wheels.
It is recommended you contact an authorized tire dealer or
original equipment dealer with any questions you may have
on tire specifications or capability. Failure to use equivalent
replacement tires may adversely affect the safety, handling,
and ride of your vehicle.WARNING!

• Do not use a tire, wheel size, load rating, or speed rating other than that specified for your vehicle. Some combina -
tions of unapproved tires and wheels may change suspen -
sion dimensions and performance characteristics,
resulting in changes to steering, handling, and braking of
your vehicle. This can cause unpredictable handling and
stress to steering and suspension components. You could
lose control and have a collision resulting in serious injury
or death. Use only the tire and wheel sizes with load
ratings approved for your vehicle.

• Never use a tire with a smaller load index or capacity, other than what was originally equipped on your
vehicle. Using a tire with a smaller load index could
result in tire overloading and failure. You could lose
control and have a collision.
• Failure to equip your vehicle with tires having adequate speed capability can result in sudden tire
failure and loss of vehicle control.
CAUTION!
Replacing original tires with tires of a different size may
result in false speedometer and odometer readings.
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282 SERVICING AND MAINTENANCE
Tire Types
All Season Tires — If Equipped
All Season tires provide traction for all seasons (Spring,
Summer, Autumn, and Winter). Traction levels may vary
between different all season tires. All season tires can be
identified by the M+S, M&S, M/S or MS designation on the
tire sidewall. Use all season tires only in sets of four; failure
to do so may adversely affect the safety and handling of your
vehicle.
Summer Or Three Season Tires — If Equipped
Summer tires provide traction in both wet and dry condi-
tions, and are not intended to be driven in snow or on ice. If
your vehicle is equipped with Summer tires, be aware these
tires are not designed for Winter or cold driving conditions.
Install Winter tires on your vehicle when ambient tempera -
tures are less than 40°F (5°C) or if roads are covered with ice
or snow. For more information, contact an authorized dealer.
Summer tires do not contain the all season designation or
mountain/snowflake symbol on the tire sidewall. Use
Summer tires only in sets of four; failure to do so may
adversely affect the safety and handling of your vehicle. Snow Tires
Some areas of the country require the use of snow tires
during the Winter. Snow tires can be identified by a “moun
-
tain/snowflake” symbol on the tire sidewall.
If you need snow tires, select tires equivalent in size
and type to the original equipment tires. Use snow
tires only in sets of four; failure to do so may
adversely affect the safety and handling of your vehicle.
Snow tires generally have lower speed ratings than what was
originally equipped with your vehicle and should not be
operated at sustained speeds over 75 mph (120 km/h). For speeds above 75 mph (120 km/h) refer to original equipment
or an authorized tire dealer for recommended safe operating
speeds, loading and cold tire inflation pressures.
WARNING!
Do not use Summer tires in snow/ice conditions. You
could lose vehicle control, resulting in severe injury or
death. Driving too fast for conditions also creates the
possibility of loss of vehicle control.
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SERVICING AND MAINTENANCE 283
While studded tires improve performance on ice, skid and
traction capability on wet or dry surfaces may be poorer than
that of non-studded tires. Some states prohibit studded tires;
therefore, local laws should be checked before using these
tire types.
Spare Tires — If Equipped
NOTE:
For vehicles equipped with Tire Service Kit instead of a spare
tire, please refer to “Tire Service Kit” in “In Case Of Emer-
gency” for further information.
Refer to “Towing Requirements - Tires” in “Starting And
Operating” for restrictions when towing with a spare tire
designated for temporary emergency use.
Spare Tire Matching Original Equipped Tire And Wheel — If
Equipped

Your vehicle may be equipped with a spare tire and wheel
equivalent in look and function to the original equipment
tire and wheel found on the front or rear axle of your vehicle.
This spare tire may be used in the tire rotation for your
vehicle. If your vehicle has this option, refer to an authorized
tire dealer for the recommended tire rotation pattern.
Compact Spare Tire — If Equipped
The compact spare is for temporary emergency use only.
You can identify if your vehicle is equipped with a compact
spare by looking at the spare tire description on the Tire and
Loading Information Placard located on the driver’s side
door opening or on the sidewall of the tire. Compact spare
tire descriptions begin with the letter “T” or “S” preceding
the size designation. Example: T145/80D18 103M.
T, S = Temporary Spare Tire
Since this tire has limited tread life, the original equipment
tire should be repaired (or replaced) and reinstalled on your
vehicle at the first opportunity.
CAUTION!
Because of the reduced ground clearance, do not take
your vehicle through an automatic car wash with a
compact or limited use temporary spare installed.
Damage to the vehicle may result.
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SERVICING AND MAINTENANCE 285
Full Size Spare — If Equipped
The full size spare is for temporary emergency use only. This
tire may look like the originally equipped tire on the front or
rear axle of your vehicle, but it is not. This spare tire may
have limited tread life. When the tread is worn to the tread
wear indicators, the temporary use full size spare tire needs
to be replaced. Since it is not the same as your original equip-
ment tire, replace (or repair) the original equipment tire and
reinstall on the vehicle at the first opportunity.
Limited Use Spare — If Equipped
The limited use spare tire is for temporary emergency use
only. This tire is identified by a label located on the limited
use spare wheel. This label contains the driving limitations
for this spare. This tire may look like the original equipped
tire on the front or rear axle of your vehicle, but it is not.
Installation of this limited use spare tire affects vehicle
handling. Since it is not the same as your original equipment
tire, replace (or repair) the original equipment tire and rein -
stall on the vehicle at the first opportunity.
Wheel And Wheel Trim Care
All wheels and wheel trim, especially aluminum and chrome
plated wheels, should be cleaned regularly using mild
(neutral Ph) soap and water to maintain their luster and to
prevent corrosion. Wash wheels with the same soap solution
recommended for the body of the vehicle and remember to
always wash when the surfaces are not hot to the touch.
WARNING!
Limited use spares are for emergency use only.
Installation of this limited use spare tire affects vehicle
handling. With this tire, do not drive more than the
speed listed on the limited use spare wheel. Keep
inflated to the cold tire inflation pressures listed on your
Tire and Loading Information Placard located on the
driver’s side B-Pillar or the rear edge of the driver’s side
door. Replace (or repair) the original equipment tire at
the first opportunity and reinstall it on your vehicle.
Failure to do so could result in loss of vehicle control.
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TECHNICAL SPECIFICATIONS 295
BRAKE SYSTEM
Your vehicle is equipped with dual hydraulic brake systems.
If either of the two hydraulic systems loses normal capa-
bility, the remaining system will still function. However,
there will be some loss of overall braking effectiveness. You
may notice increased pedal travel during application, greater
pedal force required to slow or stop, and potential activation
of the “Brake System Warning Light”.
In the event power assist is lost for any reason (i.e., repeated
brake applications with the engine off), the brakes will still
function. However, the effort required to brake the vehicle
will be much greater than that required with the power
system operating.
WHEEL AND TIRE TORQUE SPECIFICATIONS
Proper lug nut/bolt torque is very important to ensure that
the wheel is properly mounted to the vehicle. Any time a
wheel has been removed and reinstalled on the vehicle, the
lug nuts/bolts should be torqued using a properly calibrated
torque wrench using a high quality six sided (hex) deep wall
socket.
Torque Specifications
**Use only an authorized dealer recommended lug nuts/
bolts and clean or remove any dirt or oil before tightening. Lug Nut/Bolt Torque
**Lug Nut/Bolt
SizeLug Nut/Bolt
Socket Size
63 Ft-Lbs (86 N·m)
Steel Wheels Only
89 Ft-Lbs (120 N·m)
Aluminum Wheels
Only M12 x 1.25 17 mm
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344
Power .................................................................................... 171Tilt Column ............................................................................ 38
Wheel, Tilt .............................................................................. 38
Steering Wheel Audio Controls ............................................ 317
Steering Wheel Mounted Sound System Controls............. 317
Storage ........................................................................................ 68 Storage, Vehicle ................................................................. 58, 289
Storing Your Vehicle .............................................................. 289
Sun Visor Extension.................................................................. 42
Sway Control, Trailer ............................................................. 102
Synthetic Engine Oil ............................................................... 249 T
Telescoping Steering Column ................................................. 38
Tie Down Hooks, Cargo .......................................................... 66
Tilt Steering Column ................................................................ 38
Tire And Loading Information Placard ............................... 272
Tire Markings .......................................................................... 266
Tire Safety Information .......................................................... 266
Tire Service Kit ........................................................................ 227
Tires................................................................... 156, 276, 283, 288 Aging (Life Of Tires)........................................................... 280
Air Pressure ......................................................................... 276
Chains ................................................................................... 287Changing ...................................................................... 212, 266
Compact Spare..................................................................... 283
General Information ................................................... 276, 283 High Speed ...........................................................................278
Inflation Pressure ................................................................277
Jacking...........................................................................212, 266
Life Of Tires..........................................................................280
Load Capacity ..............................................................272, 273
Pressure Monitoring System (TPMS) .........................89, 103
Quality Grading...................................................................288Radial ....................................................................................278Replacement .........................................................................280
Rotation.................................................................................287
Safety .............................................................................266, 276
Sizes .......................................................................................268
Snow Tires ............................................................................282Spare Tires ....................................................................283, 285
Spinning................................................................................279Trailer Towing .....................................................................191
Tread Wear Indicators ........................................................280
Wheel Nut Torque...............................................................295
To Open Hood ...........................................................................64
Tongue Weight/Trailer Weight ............................................188
Towing ...................................................................................... 184 Disabled Vehicle ..................................................................238
Guide .....................................................................................188
Recreational ..........................................................................195
Weight ...................................................................................188
Towing Behind A Motorhome ..............................................195
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