Black plate (76,1)Cadillac SRX Owner Manual - 201110-76 Vehicle CareUniform Tire QualityGradingQuality grades can be foundwhere applicable on the tiresidewall between tread shoulderand maximum section width.For example:Treadwear 200 Traction AATemperature AThe following information relatesto the system developed by theUnited States National HighwayTraffic Safety Administration(NHTSA), which grades tiresby treadwear, traction, andtemperature performance.This applies only to vehiclessold in the United States.The grades are molded on thesidewalls of most passengercar tires. The Uniform TireQuality Grading (UTQG)system does not apply to deeptread, winter-type snow tires,space-saver, or temporary usespare tires, tires with nominalrim diameters of 10 to 12 inches(25 to 30 cm), or to somelimited-production tires.While the tires available onGeneral Motors passengercars and light trucks may varywith respect to these grades,they must also conform tofederal safety requirements andadditional General Motors TirePerformance Criteria (TPC)standards.All Passenger Car Tires MustConform to Federal SafetyRequirements In Addition ToThese Grades.TreadwearThe treadwear grade is acomparative rating basedon the wear rate of the tirewhen tested under controlledconditions on a specifiedgovernment test course.For example, a tire graded 150would wear one and a half (1½)times as well on the governmentcourse as a tire graded 100.The relative performance oftires depends upon the actualconditions of their use, however,and may depart significantlyfrom the norm due to variationsin driving habits, servicepractices and differences inroad characteristics and climate.Ofrecido por www.electromanuales.com
