UNIFORMTIREQUALITY
GRADING
DOT (Department Of Transportation) Quality
Grades:Allpassengercartiresmustconformto
federalsafetyrequirementsinadditiontothese
grades.
crete. A tire marked C may have poor traction
performance.
WARNING
WARNING
The temperature grade for this tire is
established for a tire that is properly
inflated and not overloaded. Excessive
Quality grades can be found where applicable
onthetiresidewallbetweentreadshoulderand
maximumsectionwidth.Forexample:
Thetractiongradeassignedtoyourve-
hicle tires is based on straight-ahead
brakingtractiontests,anddoesnotin-
clude acceleration, cornering, hydro-
planing,orpeaktractioncharacteristics.
speed,
underinflation,
or
excessive
loading, either separately or in combi-
nation,cancauseheatbuildupandpos-
sibletirefailure.
Treadwear200TractionAATemperatureA
Treadwear
Treadweargradeisacomparativeratingbased
on tire wear rate when tested under controlled TemperatureA,BandC
conditions
on
specified
government
test
TemperaturegradesareA(thehighest),B,and
C. They represent a tire’s resistance to heat
build-up, and its ability to dissipate heat when
tested under controlled conditions on a speci-
fiedindoorlaboratorytestwheel.Sustainedhigh
temperaturecancausetirematerialtodegener-
ate, reducing tire life. Excessive temperatures
can lead to sudden tire failure. Grade C corre-
spondstoaperformancelevelwhichallpassen-
gercartiresmustmeetundertheFederalMotor
VehicleSafetyStandardNo.109.GradesAand
B represent higher levels of performance on
laboratory test wheels than the minimum re-
quiredbylaw.
courses.Forexample,atiregraded150would
wearoneandahalf(1-1/2)timesaswellonthe
governmentcourseasatiregraded100.How-
ever,relativetireperformancedependsonactual
driving conditions, and may vary significantly
fromthenormduetovariationsindrivinghabits,
service practices and differences in road char-
acteristicsandclimate.
TractionAA,A,BandC
Thetractiongrades,fromhighesttolowest,are
AA, A, B, and C. Those grades represent the
tire’s ability to stop on wet pavement as mea-
sured under controlled conditions on specified
government test surfaces of asphalt and con-
Technicalandconsumerinformation 9-21
| Categories | Nissan Manuals, Nissan Murano Manuals |
|---|---|
| Tags | Nissan Murano 3.5 |
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| Copyright | Attribution Non-commercial |
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