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北米Model "A1320BE-C" EDITED: 2017/ 10/ 10
.
Tread rib
A tread section running circumfer-
entially around a tire..
Tread separation
Pulling away of the tread from the
tire carcass..
Treadwear indicators (TWI)
The projections within the principal
grooves designed to give a visual
indication of the degrees of wear of
the tread..
Vehicle capacity weight
The rated cargo and luggage load
plus 150 lbs (68 kg) times the
vehicle’s designated seating capa-
city..
Vehicle maximum load on the tire
Load on an individual tire that is
determined by distributing to each
axle its share of the maximum
loaded vehicle weight and dividing
by two..
Vehicle normal load on the tire
Load on an individual tire that is
determined by distributing to each
axle its share of the curb weight,
accessory weight, and normal oc-cupant weight (distributed in accor-
dance with Table 1 that is appended
to the end of this section) and
dividing by 2.
.
Wheel-holding fixture
The fixture used to hold the wheel
and tire assembly securely during
testing.
Consumer information and Reporting safety defects/Tire information
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北米Model "A1320BE-C" EDITED: 2017/ 10/ 10
&Tire care–maintenance and
safety practices.
Check on a daily basis that the
tires are free from serious damage,
nails, and stones. At the same time,
check the tires for abnormal wear.
.
Inspect the tire tread regularly
and replace the tires before their
tread wear indicators become visi-
ble. When a tire’s tread wear in-
dicator becomes visible, the tire is
worn beyond the acceptable limit
and must be replaced immediately.
With a tire in this condition, driving
at even low speeds in wet weather
can cause the vehicle to hydro-
plane. Possible resulting loss of
vehicle control can lead to an
accident.
.
To maximize the life of each tire
and ensure that the tires wear
uniformly, it is best to rotate the
tires every 7,500 miles (12,000 km).
For information about the tire rota-
tion order, refer to“
Tire rotation”
F11-25.
Replace any damaged or
unevenly worn tires at the time ofrotation. After tire rotation, adjust
the tire pressures and make sure
the wheel nuts are correctly tigh-
tened. For information about the
tightening torque and tightening
sequence for the wheel nuts, refer
to“
Flat tires”F9-5.
&Determining compatibility of
tire and vehicle load capaci-
tiesThe sum of four tires’maximum
load ratings must exceed the max-
imum loaded vehicle weight
(“GVWR”). In addition, sum of the
maximum load ratings of two front
tires and of two rear tires must
exceed each axle’smaximum
loaded capacity (“GAWR”). Original
equipment tires are designed to
fulfill those conditions.
The maximum loaded vehicle
weight is referred to Gross Vehicle
Weight Rating (GVWR). And each
axle’s maximum loaded capacity is
referred to Gross Axle Weight Rat-
ing (GAWR). The GVWR and eachaxle’s GAWR are shown on the
vehicle certification label located at
the bottom of driver’s side door
pillar.
The GVWR and front and rear
GAWRs are determined by not only
the maximum load rating of tires but
also loaded capacities of the vehi-
cle’s suspension, axles and other
parts of the body.
Therefore, this means that the
vehicle cannot necessarily be
loaded up to the tire’s maximum
load rating on the tire sidewall.
&Adverse safety conse-
quences of overloading on
handling and stopping and on
tiresOverloading could affect vehicle
handling, stopping distance, and
vehicle and tire performance in the
following ways. This could lead to
an accident and possibly result in
severe personal injury..
Vehicle stability will deteriorate.
.
Heavy and/or high-mounted
Consumer information and Reporting safety defects/Tire information
13-10
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北米Model "A1320BE-C" EDITED: 2017/ 10/ 10
All passenger car tires must con-
form to Federal Safety Require-
ments in addition to these grades.&TreadwearThe treadwear grade is a compara-
tive rating based on the wear rate of
the tire when tested under con-
trolled conditions on a specified
government test course.
Forexample,atiregraded150
would wear one and one-half (1-
1/2) times as well on the govern-
ment course as a tire graded 100.
The relative performance of tires
depends upon the actual conditions
of their use, however, and may
depart significantly from the norm
due to variations in driving habits,
service practices and differences in
road characteristics and climate.&Traction AA, A, B, CThe traction grades, from highest to
lowest, are AA, A, B and C. Those
grades represent the tire’s ability to
stop on wet pavement as measuredunder controlled conditions on spe-
cified government test surfaces of
asphalt and concrete.
A tire marked C may have poor
traction performance.
WARNING
The traction grade assigned to
this tire is based on straight-
ahead braking traction tests,
and does not include accelera-
tion, cornering, hydroplaning,
or peak traction characteris-
tics.&Temperature A, B, CThe temperature grades are A (the
highest), B, and C, representing the
tire’s resistance to the generation of
heat and its ability to dissipate heat
when tested under controlled con-
ditions on a specified indoor labora-
tory test wheel.
Sustained high temperature can
cause the material of the tire to
degenerate and reduce tire life, andexcessive temperature can lead to
sudden tire failure.
The grade C corresponds to a level
of performance which all passenger
car tires must meet under the
Federal Motor Vehicle Safety Stan-
dards No. 109.
Grades B and A represent higher
levels of performance on the la-
boratory test wheel than the mini-
mum required by law.
WARNING
The temperature grade for this
tire is established for a tire that
is properly inflated and not
overloaded. Excessive speed,
underinflation, or excessive
loading, either separately or
in combination, can cause
heat buildup and possible tire
failure.
Consumer information and Reporting safety defects/Uniform tire quality grading standards
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