Ford F 2019 Series Owner's Manual page 126

Super duty class a motorhome and commercial chassis
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Tire Wear
E142546
When the tread is worn down to
one sixteenth of an inch (2
millimeters), tires must be
replaced to help prevent your
vehicle from skidding and
hydroplaning. Built-in treadwear
indicators, or wear bars, which
look like narrow strips of smooth
rubber across the tread will
appear on the tire when the tread
is worn down to one sixteenth of
an inch (2 millimeters).
When the tire tread wears down
to the same height as these wear
bars, the tire is worn out and must
be replaced.
Damage
Periodically inspect the tire treads
and sidewalls for damage (such
as bulges in the tread or sidewalls,
cracks in the tread groove and
separation in the tread or
sidewall). If damage is observed
Motorhome (TY3) Canada/United States of America, enUSA, Edition date: 201803, First-Printing
Wheels and Tires
or suspected have the tire
inspected by a tire professional.
Tires can be damaged during
off-road use, so inspection after
off-road use is also
recommended.
Age
over time depending on many
factors such as weather, storage
conditions, and conditions of use
(load, speed, inflation pressure)
the tires experience throughout
their lives.
should be replaced after six years
regardless of tread wear or even
if they have not been used.
However, heat caused by hot
climates or frequent high-load
conditions can accelerate the
aging process and may require you
to replace tires more frequently.
replace your spare tire when you
replace the road tires or after six
years due to aging even if it has
not been used.
123
WARNING: Tires degrade
WARNING: In general, tires
WARNING: You should

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