2018 Ram 2500 wheel size

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.
WARNING!
Do not use Summer tires in snow/ice con-
ditions. 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.
Snow Tires
Some areas of the country require the use of
snow tires during the Winter. Snow tires can
be identified by a “mountain/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; fail-ure 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 sus-
tained 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 pres-
sures.
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
For vehicles equipped with Tire Service Kit
instead of a spare tire, please refer to “Tire
Service Kit” in “In Case Of Emergency” in the
Owner’s Manual for further information.
CAUTION!
Because of the reduced ground clearance,
do not take your vehicle through an auto-
matic car wash with a compact or limited
use temporary spare installed. Damage to
the vehicle may result.
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 op-
tion, refer to an authorized tire dealer for the
recommended tire rotation pattern.
Compact Spare Tire — If Equipped
The compact spare is for temporary emer-
gency use only. You can identify if your ve-
hicle 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
269

sidewall of the tire. Compact spare tire de-
scriptions 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.
Do not install a wheel cover or attempt to
mount a conventional tire on the compact
spare wheel, since the wheel is designed
specifically for the compact spare tire. Do not
install more than one compact spare tire and
wheel on the vehicle at any given time.
WARNING!
Compact and collapsible spares are for
temporary emergency use only. With these
spares, do not drive more than 50 mph
(80 km/h). Temporary use spares have
limited tread life. When the tread is worn
to the tread wear indicators, the temporary
use spare tire needs to be replaced. Be
sure to follow the warnings, which apply to
WARNING!
your spare. Failure to do so could result in
spare tire failure and loss of vehicle con-
trol.
Collapsible Spare Tire — If Equipped
The collapsible spare is for temporary emer-
gency use only. You can identify if your ve-
hicle is equipped with a collapsible 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.
Collapsible spare tire description example:
165/80-17 101P.
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.
Inflate collapsible tire only after the wheel is
properly installed to the vehicle. Inflate the
collapsible tire using the electric air pump
before lowering the vehicle. Do not install a wheel cover or attempt to
mount a conventional tire on the collapsible
spare wheel, since the wheel is designed
specifically for the collapsible spare tire.
WARNING!
Compact and Collapsible spares are for
temporary emergency use only. With these
spares, do not drive more than 50 mph
(80 km/h). Temporary use spares have
limited tread life. When the tread is worn
to the tread wear indicators, the temporary
use spare tire needs to be replaced. Be
sure to follow the warnings, which apply to
your spare. Failure to do so could result in
spare tire failure and loss of vehicle con-
trol.
Full Size Spare — If Equipped
The full size spare is for temporary emer-
gency 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
SERVICING AND MAINTENANCE
270

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 re-
moved 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
All wheel nuts should be tightened occasion-
ally to eliminate the possibility of wheel studs
being sheared or the bolt holes in the wheels
becoming elongated. This is especially im-
portant during the first few hundred miles/
kilometers of operation to allow the wheel
nuts to become properly set. All wheel nuts
should first be firmly seated against the
wheel. The wheel nuts should then be tight-
ened to recommended torque. Tighten the
wheel nuts to final torque in increments.
Progress around the bolt circle, tightening
the wheel nut opposite to the wheel nut justpreviously tightened until final torque is
achieved. Ensure that the socket is fully en-
gaged on the lug nut/bolt (do not insert it
halfway).
Recommended torques are shown in the fol-
lowing chart:
Disc Wheels
Nut
Ty p e
Stud
Size Hex
SizeTorque
Ft LbsTorque
Newton
Meters
Cone M14 x
1.5 22 mm 130 176
Flanged M14 x
1.5 22 mm 140 190
8-Stud — Dual Rear Wheels
• Dual wheels are flat-mounted and center-
piloted. The lug nuts are a two-piece as-
sembly. When the tires are being rotated or
replaced, clean these lug nuts and add two
drops of oil at the interface between the hex
and the washer. • Slots in the wheels will assist in properly
orienting the inner and outer wheels. Align
these slots when assembling the wheels for
best access to the tire valve on the inner
wheel. The tires of both dual wheels must
be completely off the ground when tighten-
ing, to ensure wheel centering and maxi-
mum wheel clamping.
Oil Interface LocationTECHNICAL SPECIFICATIONS
276

Jacking..................211
Life Of Tires ...............267
Load Capacity ..............261
Pressure Monitor System (TPMS) . . .88
Pressure Warning Light .........79
Quality Grading .............272
Radial ..................266
Replacement ..............267
Safety ...............257, 264
Sizes ...................258
Snow Tires ................269
Spare Tire .........269, 270, 271
Spinning .................266
Tread Wear Indicators .........267
Wheel Nut Torque ...........276
Tire Safety Information ...........257
To Open Hood .................50
Towing .....................191
Disabled Vehicle ............225
Guide ...................191
Recreational ...............196
Weight ..................191
Towing Vehicle Behind A Motorhome . .196
Trailer Towing ................191
Minimum Requirements .......191
Trailer Towing Guide ............191
Trailer Weight ................191 Transfer Case
Electronically Shifted . .162, 164, 166,
168 Fluid ............282, 284, 286
Transmission .................156
Automatic .........156, 158, 160
Fluid ............282, 284, 286
Shifting .................155
Transporting Pets ..............133
Tread Wear Indicators ............267
Turn Signals .............32, 33, 83
Uconnect 3.0 ................295
Uconnect

(Hands-Free Phone)
Making A Phone Call ......332, 338
Receiving A Call ............332
Uconnect Phone ........332, 337, 338
Uconnect Settings Customer Programmable Features . . .19
Passive Entry Programming .......19
Uconnect Voice Command .....337, 340
Uniform Tire Quality Grades ........272
Untwisting Procedure, Seat Belt ......98
USB Port ...................325
Utility Rails, Rear Cargo Area ........62Vehicle Loading
...............261
Vehicle Storage ................48
Vehicle User Guide ICON Symbol Glossary ..........11
In Vehicle Help ..............11
IVH .....................11
Navigation .................11
Operating Instructions ..........11
Searching User Guide ..........11
Voice Command ...............337
Voice Recognition System (VR) ..............337, 338, 340
Voltmeter ................149, 151
Warning Lights (Instrument Cluster Description) .................79
Washers, Windshield .............35
Water Separator, Diesel Fuel . . . .249, 253
Wheel And Wheel Trim ...........271
Wheel And Wheel Trim Care ........271
Wheel Cover .................217
Wheel Nut Torque ..............276
Wind Buffeting ................50
Window Fogging ................48
363