2003 Lexus SC 430 User Guide - Page 336

CHASSIS - TIRES AND WHEELS Standard and run-flat tires: Tire size Tire inflation pressure Recommended cold tire inflation pressure Front Rear 230 kPa (2.3 kgf/cm2 or bar, 33 psi) 230 kPa (2.3 kgf/cm2 or bar, 33 psi) 245/40ZR18 245/40ZR18 93Y For sustained high speeds above 180 km/h (112 mph), in countries where such speeds are permitted by law, add 80 kPa (0.8 kgf/cm2 or bar, 12 psi) to the front tires and rear tires, but never exceed the maximum cold tire pressure molded on the tire sidewall. Wheel size Wheel nut torque Compact spare tire: Tire size Tire inflation pressure Wheel size Wheel nut torque T145/70R17 106M 420 kPa (4.3 kgf/cm2, 4.2 bar, 60 psi) 17 x 4T 103 N·m (10.5 kgf·m, 76 ft·lbf.) 18 x 8 JJ 103 N·m (10.5 kgf·m, 76 ft·lbf.) NOTE: For complete information on tires (e.g. replacing tires or replacing wheels), see "Checking tire pressure" through "Aluminum wheel precautions" on page 321 through 330. 318