Page 290 of 506

•Narrower – to provide greater
maneuverability in tight spaces,
particularly in off-road use.
As a result of the above dimensional
differences, sport-utility vehicles,
vans and trucks often will have a
higher center of gravity and a
greater difference in center of
gravity between the loaded and
unloaded condition.
These differences that make your
vehicle so versatile also make it
handle differently than an ordinary
passenger car.
TIRE CARE
Information About Uniform Tire Quality Grading
Tire Quality Grades apply to new
pneumatic passenger car tires. The Tire
Quality Grades can be found where
applicable on the tire sidewall between
tread shoulder and maximum section
width. For example:
•Treadwear 200 Traction AA Temperature A
These Tire Quality Grades are determined by standards that the
United States Department of Transportation has set.
Tire Quality Grades apply to new pneumatic passenger car tires.
They do not apply to deep tread, winter-type snow tires, space-saver or
temporary use spare tires, light truck or LT type tires, tires with nominal
rim diameters of 10 to 12 inches or limited production tires as defined in
Title 49 Code of Federal Regulations Part 575.104(c)(2).
U.S. Department of Transportation-Tire quality grades:The U.S.
Department of Transportation requires Ford Motor Company to give you
the following information about tire grades exactly as the government
has written it.
Wheels and Tires289
2014 Navigator(nav)
Owners Guide gf, 1st Printing, June 2013
USA(fus)
Page 312 of 506

2.Full-size dissimilar spare with label on wheel:This spare tire
has a label on the wheel that states: THIS TIRE AND WHEEL FOR
TEMPORARY USE ONLY
When driving with one of the dissimilar spare tires listed above, do not:
•exceed 50 mph (80 km/h).
•load the vehicle beyond maximum vehicle load rating listed on the
Safety Compliance Label.
•tow a trailer.
•use snow chains on the end of the vehicle with the dissimilar spare
tire.
•use more than one dissimilar spare tire at a time.
•use commercial car washing equipment.
•try to repair the dissimilar spare tire.
Use of one of the dissimilar spare tires listed above at any one wheel
location can lead to impairment of the following:
•Handling, stability and braking performance
•Comfort and noise
•Ground clearance and parking at curbs
•Winter weather driving capability
•Wet weather driving capability
•All-wheel driving capability
3.Full-size dissimilar spare without label on wheel
When driving with the full-size dissimilar spare tire and wheel assembly,
do not:
•exceed 70 mph (113 km/h).
•use more than one dissimilar spare tire and wheel at a time.
•use commercial car washing equipment.
•use snow chains on the end of the vehicle with the dissimilar spare
tire and wheel.
The usage of a full-size dissimilar spare tire and wheel assembly can lead
to impairment of the following:
•Handling, stability and braking performance
•Comfort and noise
Wheels and Tires311
2014 Navigator(nav)
Owners Guide gf, 1st Printing, June 2013
USA(fus)
Page 313 of 506

•Ground clearance and parking at curbs
•Winter weather driving capability
•Wet weather driving capability
•All-wheel driving capability (if applicable)
•Load leveling adjustment (if applicable)
When driving with the full-size dissimilar spare tire and wheel assembly,
additional caution should be given to:
•towing a trailer.
•driving vehicles equipped with a camper body.
•driving vehicles with a load on the cargo rack.
Drive cautiously when using a full-size dissimilar spare tire and wheel,
and seek service as soon as possible.
Tire Change Procedure
WARNING:When one of the front wheels is off the ground, the
transmission alone will not prevent the vehicle from moving or
slipping off the jack, even if the transmission selector lever is in
positionP.
WARNING:To help prevent the vehicle from moving when you
change a tire, be sure to place the transmission selector lever in
positionP,set the parking brake and block (in both directions) the
wheel that is diagonally opposite (other side and end of the vehicle) to
the tire being changed.
WARNING:Never get underneath a vehicle that is supported
only by a jack. If the vehicle slips off the jack, you or someone
else could be seriously injured.
WARNING:Do not attempt to change a tire on the side of the
vehicle close to moving traffic. Pull far enough off the road to
avoid the danger of being hit when operating the jack or changing the
wheel.
312Wheels and Tires
2014 Navigator(nav)
Owners Guide gf, 1st Printing, June 2013
USA(fus)