(A) Tire Size: The tire size code is a combinationof letters and numbers used to define a particulartire’s width, height, aspect ratio, constructiontype and service description. See the “Tire Size”illustration later in this section for more detail.(B) TPC Spec (Tire Performance CriteriaSpecification): Original equipment tires designedto GM’s specific tire performance criteria havea TPC specification code molded onto the sidewall.GM’s TPC specifications meet or exceed allfederal safety guidelines.(C) Dual Tire Maximum Load: Maximum loadthat can be carried and the maximum pressureneeded to support that load when used in a dualconfiguration.(D) DOT (Department of Transportation): TheDepartment of Transportation (DOT) codeindicates that the tire is in compliance with theU.S. Department of Transportation Motor VehicleSafety Standards.(E) Tire Identification Number (TIN): The lettersand numbers following DOT code are the TireIdentification Number (TIN). The TIN showsthe manufacturer and plant code, tire size, anddate the tire was manufactured. The TIN is moldedonto both sides of the tire, although only oneside may have the date of manufacture.Light Truck Tire Example6-50
