Black plate (53,1)Cadillac SRX Owner Manual - 2010Vehicle Care 9-53Tire Sidewall LabelingUseful information about a tire ismolded into its sidewall. Theexamples below show a typicalpassenger vehicle tire and acompact spare tire sidewall.Passenger (P‐Metric) Tire Example(A) Tire Size : The tire size is acombination of letters andnumbers used to define aparticular tire's width, height,aspect ratio, construction type,and service description. See the“Tire Size” illustration later in thissection for more detail.(B) TPC Spec (TirePerformance CriteriaSpecification) : Originalequipment tires designed toGM's specific tire performancecriteria have a TPC specificationcode molded onto the sidewall.GM's TPC specifications meet orexceed all federal safetyguidelines.(C) DOT (Department ofTransportation) : TheDepartment of Transportation(DOT) code indicates that thetire is in compliance with theU.S. Department ofTransportation Motor VehicleSafety Standards.(D) Tire Identification Number(TIN) : The letters and numbersfollowing the DOT (Departmentof Transportation) code is theTire Identification Number (TIN).The TIN shows themanufacturer and plant code,tire size, and date the tire wasmanufactured. The TIN ismolded onto both sides of thetire, although only one side mayhave the date of manufacture.(E) Tire Ply Material : The typeof cord and number of plies inthe sidewall and under the tread.(F) Uniform Tire QualityGrading (UTQG) : Tiremanufacturers are required tograde tires based on threeperformance factors: treadwear,traction, and temperatureresistance. For more informationsee Uniform Tire QualityGrading on page 9‑71.(G) Maximum Cold InflationLoad Limit : Maximum loadthat can be carried and themaximum pressure needed tosupport that load.
