²Narrower Ð to provide greater
maneuverability in tight spaces,
particularly in off-road use.
As a result of the above dimensional
differences, SUV's 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.
INFORMATION ABOUT UNIFORM TIRE QUALITY GRADING
New vehicles are fitted with tires
that have a rating on them called
Tire Quality Grades. The Quality
grades can be found where
applicable on the tire sidewall
between tread shoulder and
maximum section width. For
example:
²Treadwear 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 tires for use on passenger
cars. They do not apply to deep tread, winter-type snow tires,
space-saver or temporary use spare 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.
Tires, Wheels and Loading
172
²Use snow chains on the end of the vehicle with the dissimilar spare
tire
²Use more than one dissimilar spare tire at a time
²Use commercial car washing equipment
²Try 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:
²Handling, stability and braking performance
²Comfort and noise
²Ground clearance and parking at curbs
²Winter weather driving capability
²Wet weather driving capability
For vehicles equipped with 4WD, it is not recommended that the vehicle
be operated in 4WD modes with a temporary emergency spare tire. If
4WD operation is necessary, do not operate above speeds of 10 mph (16
km/h) or for distances above 50 miles (80 km).
3.Full-size dissimilar spare without label on wheel
When driving with the full-size dissimilar spare tire/wheel,do not:
²Exceed 70 mph (113 km/h)
²Use more than one dissimilar spare tire/wheel at a time
²Use commercial car washing equipment
²Use snow chains on the end of the vehicle with the dissimilar spare
tire/wheel
The usage of a full-size dissimilar spare tire/wheel can lead to
impairment of the following:
²Handling, stability and braking performance
²Comfort and noise
²Ground clearance and parking at curbs
²Winter weather driving capability
²Wet weather driving capability
²All-Wheel driving capability (if applicable)
²Load leveling adjustment (if applicable)
Roadside Emergencies
248
