Black plate (45,1)Cadillac CTS Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-6081492) - 2014 - CRC 2nd Edition - 11/18/13Vehicle Care 10-45(4) Tire Identification Number(TIN) : The letters and numbersfollowing the DOT code are 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.(5) Tire Ply Material : The typeof cord and number of plies inthe sidewall and under the tread.(6) 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 10-59.(7) Maximum Cold InflationLoad Limit : Maximum load thatcan be carried and themaximum pressure needed tosupport that load.Tire DesignationsTire SizeThe following is an example of atypical passenger vehicletire size.(1) Passenger (P-Metric) Tire :The United States version of ametric tire sizing system. Theletter P as the first character inthe tire size means a passengervehicle tire engineered tostandards set by the U.S. Tireand Rim Association.(2) Tire Width : The three-digitnumber indicates the tire sectionwidth in millimeters fromsidewall to sidewall.(3) Aspect Ratio : A two-digitnumber that indicates the tireheight-to-width measurements.For example, if the tire sizeaspect ratio is 60, as shown initem 3 of the illustration, it wouldmean that the tire's sidewall is60 percent as high as it is wide.(4) Construction Code : A lettercode is used to indicate the typeof ply construction in the tire.The letter R means radial plyconstruction; the letter D meansdiagonal or bias plyconstruction; and the letter Bmeans belted-bias plyconstruction.
