1
Tread wear grade
2
Traction grade
3
Temperaturegrade
%
The datashown in theillustration is sample
data.
%
This grading is notlegallyprescribed forCan‐
ada,but specified in mostcases anyway.
Tread wear grade
The tread wear grade is acomparativegrading
based on tread wear grade testsconducted
under controlled conditionsonaspecified U.S.
Department of Transportationtesttrack.For
example, atiregraded 150would wear one and
one-half times as well on thegovernment test
trackasatiregraded100.
The relativeperformanceoftires depends upon
theactual conditions of their use, however, and
maydepartsignificantlyfromthe normdue to
variations in drivinghabits, servicepractices and
differences in road characteristicsand climate
conditions.
Tractiongrade
&
DANGER Risk of accidentdue to inade‐
quatetraction
The traction grade assigned to this tireis
based on straight-ahead brakingtraction
tests, and does notinclude either accelera‐
tion, cornering, hydroplaning or peak traction
characteristics.
#
Alwaysadaptyour driving styleand
driveataspeed to suit theprevailing
trafficand weather conditions.
*
NOTE Damage to thedrivetrainfrom
wheelspin
#
Avoid wheelspin.
The traction grades –fromhighesttolowest –
areAA, A, Band C. These grades relatetothe
tire's ability to come to astandstill on awet pave‐
ment under controlledconditions on aspecified
U.S. government test surface madefromasphalt
and concrete.
Temperaturegrade
&
WARNING Risk of accident from tire
overheating and tirefailure
The temperaturegrade forthis tireisestab‐
lished foratirethat is properly inflated and
notoverloaded. Excessivespeed, underinfla‐
tion, or excessiveloading, either separatelyor
in combination, can cause excessiveheat
build-up and possible tirefailure.
#
Observe therecommended tirepres‐
sures and regularly checkthe tirepres‐
sureofall tires including thespare
wheel.
#
Adjustthe tirepressureasnecessary.
The temperaturegrades areA(highestgrade), B
and C. These relatetoatire's resistance to heat
and its ability to release heat on aspecified test
wheel in laboratorytests under controlled condi‐
tions. Sustained high temperatures can cause the
material of thetiretodegenerateand reduce tire
life. In addition, excessivelyhigh temperatures
can lead to sudden tirefailure. Grade Crefersto
aperformancewhichall passenger vehicle tires
mustexhibit, accordingtothe U.S. Department
of Transportation's requirements.
Information on DOTand TIN (TireIdentifica‐
tion Number)
U.S. tireregulations indicatethat everytireman‐
ufacturer or retreadermustimprint aTIN in or on
thesidewall of eachtireproduced.
%
The datashown in theillustration is sample
data.
224
Wheels and tires
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