Black plate (58,1)Cadillac SRX Owner Manual - 201110-58 Vehicle Care(E) Rim Diameter : Diameter ofthe wheel in inches.(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 amountof air inside the tire pressingoutward on each square inchof the tire. Air pressure isexpressed in psi (pounds persquare inch) or kPa (kilopascal).Accessory Weight : Thismeans the combined weightof optional accessories.Some examples of optionalaccessories are, automatictransmission, power steering,power brakes, power windows,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 pneumatictire in which the plies are laidat alternate angles less than90 degrees to the centerlineof the 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 10‑61.Curb Weight : The weight of amotor vehicle with standard andoptional equipment includingthe maximum capacity of fuel,oil, and coolant, but withoutpassengers and cargo.DOT Markings : A codemolded into the sidewall ofa tire signifying that the tireis in compliance 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 9‑12.
