2018 JEEP WRANGLER UNLIMITED ground clearance

HOW TO USE THIS MANUAL
Essential Information
Consult the Table of Contents to determine
which section contains the information you
desire.
Since the specification of your vehicle de-
pends on the items of equipment ordered,
certain descriptions and illustrations may dif-
fer from your vehicle's equipment.
The detailed index at the back of this Owner's
Manual contains a complete listing of all
subjects.
Symbols
Some vehicle components have colored la-
bels whose symbols indicate precautions to
be observed when using this component.
Refer to “Warning Lights and Messages” in
“Getting To Know Your Instrument Panel” for
further information on the symbols used in
your vehicle.
ROLLOVER WARNING
Utility vehicles have a significantly higher
rollover rate than other types of vehicles. This
vehicle has a higher ground clearance and a
higher center of gravity than many passenger
vehicles. It is capable of performing better in
a wide variety of off-road applications. Driven
in an unsafe manner, all vehicles can go out
of control. Because of the higher center of
gravity, if this vehicle is out of control it may
roll over when some other vehicles may not.
Do not attempt sharp turns, abrupt maneu-
vers, or other unsafe driving actions that can
cause loss of vehicle control. Failure to oper-
ate this vehicle safely may result in a colli-
sion, rollover of the vehicle, and severe or
fatal injury. Drive carefully.Failure to use the driver and passenger seat
belts provided is a major cause of severe or
fatal injury. In a rollover crash, an unbelted
person is significantly more likely to die than
a person wearing a seat belt. Always buckle
up.
Rollover Warning Label
HOW TO USE THIS MANUAL
2

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;
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 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-
CAUTION!
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
235

Contour Dimension / inches (mm)
Wrangler Rubicon 170.6 (4334) 74.6 (1894)72.5 (1841) (*) / 73.1
(1879) (**)96.8 (2459)
Wrangler Unlimited Rubi-
con192.2 (4882) 74.6 (1894)72.8 (1848) (*) / 74.5
(1901) (**)118.4 (3008)
(*) Models with hard top.
(**) Models with soft top.
Minimum Ground Clearance / Typical Angles
Maximum Ground Clearance
– inches (mm) (A)Approach Angle (B) Departure Angle (C) Breakover Angle (D)
Wrangler Sport 9.3 (235) 35.2° 29.2° 23.9°
Wrangler Unlimited Sport 9.1 (232) 34.8° 29.9° 19.2°
Wrangler Sahara 10.2 (260) 37.4° 30.5° 26.2°
Wrangler Unlimited Sahara 9.5 (242) 35.4° 30.7° 20.0°
Wrangler Rubicon 9.9 (252) 36.4° 30.8° 25.8°
Wrangler Unlimited Rubi-
con9.9 (252) 36.0° 31.4° 20.8°
TECHNICAL SPECIFICATIONS
248

Minimum Ground Clearance (Reference A)
The clearance value is measured next to the
lower edge of the differential. This value also
defines those for the “Approach Angle” the
“Departure Angle” and the “Breakover
Angle”.
Dimensions are expressed in inches (mm)
and refer to the vehicle equipped with its
original tires.
Approach Angle (Reference B)
The approach angle is determined by the
horizontal line of the road surface, and by the
tangent line passing between the front wheel,
and the most projecting low point of the car.The wider the angle, the lower the chance to
hit an obstacle with the body or chassis, when
climbing a steep slope or overcoming an
obstacle.
Departure Angle (Reference C)
The departure angle is determined by the
same lines of the “Approach Angle”, and
refers to the rear part of the vehicle.
Breakover Angle (Reference D)
The value of the “Breakover Angle” is linked
to the ground clearance of the vehicle and
indicates the attitude of the vehicle to over-
come a wedge, more or less steep, preventing
the vehicle from resting on the ground with
the body or chassis after touching the wedge
with its lowest and most projecting parts
(usually the underbody), because this would
highly reduce wheel grip.The wheels, without a suitable grip to the
ground, will not have sufficient hold to move
the vehicle, and will surge.
The higher the ground clearance, the wider
the breakover angle. Always bear in mind that
the higher the ground clearance, the lower
the stability, due to a higher center of gravity
which reduces the side rollover angle.
Ground Clearance / Typical Angles
Measurements
249