1999 Lexus RX 300 Owners Manual - Page 441

CHASSIS CHECKING TIRE PRESSURE 63R004a The recommended cold tire pressures, tire size and the vehicle capacity weight are given on the label. You should check the tire pressures every two weeks, or at least once a month. And don't forget the spare! The air pressure for the spare tire should be 210 kPa (2.1 kgf/cm2 or bar, 30 psi). Incorrect tire pressure can reduce tire life and make your vehicle less safe to drive. Low tire pressure results in excessive wear, poor handling, reduced fuel economy, and the possibility of blowouts from overheated tires. Also, low tire pressure can cause poor sealing of the tire bead. If the tire pressure is excessively low, there is the possibility of wheel deformation and/or tire separation. So keep your tire pressures at the proper level. If a tire needs frequent refilling, have it checked by your Lexus dealer. High tire pressure produces a harsh ride, handling problems, excessive wear at the center of the tire tread, and a greater possibility of tire damage from road hazards. The following instructions for checking tire pressure should be observed: D The pressure should be checked only when the tires are cold. If your vehicle has been parked for at least 3 hours and has not been driven for more than 1.5 km or 1 mile 424