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48
Maintenance Fundamentals
Tire
Service
Life
The
service life
of
your tires
is
dependent on
many factors,
including,
but
not limited to,
riding habits, road conditions,
vehicle loading,
tire air pressure, maintenance history, speed,
and
environmental conditions
(even
when the
tires
are
not
in
use).
In
addition
to
your regular inspections and
maintenance, it
is
recommended that you have
annual inspections performed once the tires
reach
5
years
old. It
is
also
recommended
that
all
tires
be
removed from service after 10
years
from the date
of
manufacture, regardless
of
their condition or state
of
wear.
The
last
four
digits
of
the
TIN
(tire identification
number) indicate the date
of
manufacture.
I
Tire
Identification
Number
(TIN)
Th
e tire identification number
(T
IN
) is a group
of
numbers and letters located on the sidewall
of
the tire.
CD
0 ®
DOT XXXX XXXX 22 09
DOT: This indicates
that
the
tire meets
all requirements
of
the
U.S.
Department
of
Transportation.
CD
XXXX: Factory code
0 XXXX: Tire type code
@ 22 09:
Date
of manufacture (week & y
ear
).
Example:
week
22 in year 09.
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