10-48 Vehicle CareTire Pressure forHigh-Speed Operation{ WARNINGDriving at high speeds, 160 km/h(100 mph) or higher, puts anadditional strain on tires.Sustained high-speed drivingcauses excessive heat buildupand can cause sudden tire failure.You could have a crash and youor others could be killed. Somehigh-speed rated tires requireinflation pressure adjustment forhigh-speed operation. Whenspeed limits and road conditionsare such that a vehicle can bedriven at high speeds, make surethe tires are rated for high-speedoperation, in excellent condition,and set to the correct cold tireinflation pressure for thevehicle load.Vehicles with P265/65R18 or P285/45R22 size tires require inflationpressure adjustment when drivingthe vehicle at speeds of 160 km/h(100 mph) or higher. Set the coldinflation pressure to 20 kPa (3 psi)above the recommended tirepressure shown on the Tire andLoading Information Label. Returnthe tires to the recommended coldtire inflation pressure whenhigh-speed driving has ended. SeeVehicle Load Limits on page 9‑14and Tire Pressure on page 10‑46.Tire Pressure MonitorSystemThe Tire Pressure Monitor System(TPMS) uses radio and sensortechnology to check tire pressurelevels. The TPMS sensors monitorthe air pressure in your tires andtransmit tire pressure readings to areceiver located in the vehicle.Each tire, including the spare (ifprovided), should be checkedmonthly when cold and inflated tothe inflation pressure recommendedby the vehicle manufacturer on thevehicle placard or tire inflationpressure label. (If your vehicle hastires of a different size than the sizeindicated on the vehicle placard ortire inflation pressure label, youshould determine the proper tireinflation pressure for those tires.)As an added safety feature, yourvehicle has been equipped with atire pressure monitoring system(TPMS) that illuminates a low tirepressure telltale when one or moreof your tires is significantlyunder-inflated.Accordingly, when the low tirepressure telltale illuminates, youshould stop and check your tires assoon as possible, and inflate themto the proper pressure. Driving on asignificantly under-inflated tirecauses the tire to overheat and canlead to tire failure. Under-inflationalso reduces fuel efficiency and tiretread life, and may affect thevehicle's handling and stoppingability.
