2009 Lexus IS F Owners Manual - Page 306

4-3. Do-it-yourself maintenance NOTICE n Driving on rough roads Take particular care when driving on roads with loose surfaces or pot holes. These conditions may cause losses in tire inflation pressure, reducing the cushioning ability of the tires. In addition driving on rough roads may cause damage to the tires themselves, as well as the vehicle's wheels and body. n Low profile tires Low profile tires may cause greater damage than usual to the tire wheel when receiving impact from the road surface. Therefore pay attention to the following: l Be sure to use proper tire inflation pressure. If tires are under-inflated, they may be damaged more severely. l Avoid pot holes, uneven pavement, curbs and other road hazards. Failure to do so can lead to severe tire and wheel damage. n If tire inflation pressures become low while driving Do not continue driving, or your tires and/or wheels may be ruined. 310