Black plate (69,1)Cadillac CTS/CTS-V Owner Manual - 2011Vehicle Care 10-69(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 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 10‑72.Curb Weight : The weight ofa motor vehicle with standardand optional equipmentincluding the maximum capacityof fuel, oil, and coolant, butwithout passengers and cargo.InformationProvidedby:
