9-59Buying New TiresGM has developed and matchedspecific tires for your vehicle. Theoriginal equipment tires installedon your vehicle, when it was new,were designed to meet GeneralMotors Tire Performance CriteriaSpecification (TPC Spec) systemrating. If you need replacementtires, GM strongly recommendsthat you get tires with the sameTPC Spec rating. This way, yourvehicle will continue to have tiresthat are designed to give thesame performance and vehiclesafety, during normal use, as theoriginal tires.GM's exclusive TPC Specsystem considers over a dozencritical specifications that impactthe overall performance of yourvehicle, including brake systemperformance, ride and handling,traction control, and tire pressuremonitoring performance. GM'sTPC Spec number is moldedonto the tire's sidewall near thetire size. If the tires have anall-season tread design, the TPCSpec number will be followed byan MS for mud and snow.GM recommends replacing tiresin sets of four. This is becauseuniform tread depth on all tireswill help keep your vehicleperforming most like it did whenthe tires were new. Replacingless than a full set of tires canaffect the braking and handlingperformance of your vehicle. SeeTire Inspection on page 9-56 andTire Rotation on page 9-57 forinformation on proper tirerotation.{ WARNINGMixing tires could cause you tolose control while driving. Ifyou mix tires of different sizes,brands, or types (radial andbias-belted tires), the vehiclemay not handle properly, andyou could have a crash. Usingtires of different sizes, brands,or types may also causedamage to your vehicle. Besure to use the correct size,brand, and type of tires on allwheels. It is all right to drivewith your compact sparetemporarily, as it wasdeveloped for use on yourvehicle. See Compact SpareTire on page 9-79.srx.book Page 59 Monday, June 8, 2009 8:28 AM
