Black plate (71,1)Cadillac CTS/CTS-V Owner Manual (Include Mex) - 2012Vehicle Care 10-71(F) Service Description : Thesecharacters represent the loadindex and speed rating of thetire. The load index representsthe load carrying capacity a tireis certified to carry. The speedrating is the maximum speed atire is certified to carry a load.Tire Terminology andDefinitionsAir Pressure : The amount ofair inside the tire pressingoutward on each square inchof the tire. Air pressure isexpressed in kPa (kilopascal)or psi (pounds per square inch).Accessory Weight : Thecombined weight of optionalaccessories. Some examples ofoptional accessories areautomatic transmission, powersteering, power brakes, powerwindows, power seats, and airconditioning.Aspect Ratio : The relationshipof a tire's height to its width.Belt : A rubber coated layer ofcords that is located betweenthe plies and the tread. Cordsmay be made from steel or otherreinforcing materials.Bead : The tire bead containssteel wires wrapped by steelcords that hold the tire ontothe rim.Bias Ply Tire : A pneumatic tirein which the plies are laid atalternate angles less than90 degrees to the centerline ofthe tread.Cold Tire Pressure : Theamount of air pressure in a tire,measured in kPa (kilopascal)or psi (pounds per square inch)before a tire has built up heatfrom driving. See Tire Pressureon page 1074.Curb Weight : The weight of amotor vehicle with standard andoptional equipment including themaximum capacity of fuel, oil,and coolant, but withoutpassengers and cargo.DOT Markings : A codemolded into the sidewall of atire signifying that the tire is incompliance with the U.S.Department of Transportation(DOT) Motor Vehicle SafetyStandards. The DOT codeincludes the Tire IdentificationNumber (TIN), an alphanumericdesignator which can alsoidentify the tire manufacturer,production plant, brand, anddate of production.GVWR : Gross Vehicle WeightRating. See Vehicle Load Limitson page 912.
