0
0)
-
N
,....
N
-
0
s
..
maximum permissible road
speeds. See also ¢ .&
in General
information on page 201.
Tire pressure mon itoring
system*
means a system that detects
when one or more of a vehicle's
tires are underinflated and illumi-
nates a low tire pressure warning
telltale.
Tread
means that portion of a tire that
comes into contact with the road .
Tread separation
means pulling away of the tread
from the tire carcass.
Treadwea r indicators (TWI)
means the projections within the
principal grooves designed to give
a visual ind ication of the degrees
of wear of the tread. See
¢ page 210, Treadwear indicator
for more information on measur-
ing tire wear .
Uniform Tire Quality Grading
is a tire information system devel-
oped by the United States Nation-
al Highway Traffic Safety Admin-
istration (NHTSA) that is designed
to help buyers make relat ive com-
Wheels
parisons among tires . The UTQG
is not a safety rating and not a
guarantee that a tire will last for
a prescribed number of miles
(kilometers) or perform in acer-
tain way . It simply gives tire buy-
ers additional information to
combine with other considera-
tions, such as price, brand loyalty
and dealer recommendatio ns . Un-
der UTQG, tires are graded by the
tire manufacturers in three areas :
treadwear, t raction, and tempera-
ture resistance. The UTQG infor-
mation on the tires, molded into
the sidewalls.
U.S. DOT Tire Identification
Number (TIN)
This is the tire's "se rial number" .
It begins with the letters "DOT"
and indicates that the tire meets
all federal standards. The next
two numbers or letters indicate
the plant whe re it was manufac-
tured, and the last four numbers
represent the week and year of
manufactu re . For example,
DOT ... 2217 ...
means that the tire was produced
in the 22nd week of 2017 . The
other numbers are marketing co-
des that may or may not be used .,.
2 07
To Next Page
Loading...
