2009 Acura MDX Owner's Manual - Page 420

Main Menu Table Of Contents Tires Check the air pressures when the tires are cold. This means the vehicle has been parked for at least 3 hours, or driven less than 1 mile (1.6 km). Add or release air, if needed, to match the recommended cold tire pressures. If you check air pressures when the tires are hot [driven for several miles (kilometers)], you will see readings 4 to 6 psi (30 to 40 kPa, 0.3 to 0.4 kgf/cm2) higher than the cold readings. This is normal. Do not let air out to match the recommended cold air pressure. The tire will be underinflated. While tubeless tires have some ability to self-seal if they are punctured, you should look closely for punctures if a tire starts losing pressure. You should get your own tire pressure gauge and use it whenever you check your tire pressures. This will make it easier for you to tell if a pressure loss is due to a tire problem and not due to a variation between gauges. Recommended Tire Pressures The following chart shows the recommended cold tire pressures for most normal and high-speed driving conditions. Tire Size P255/55R18 104H Cold Tire Pressure for Normal Driving Front/Rear: 32 psi (220 kPa, 2.2 kgf/cm2) The compact spare tire pressure is: 60 psi (420 kPa, 4.2 kgf/cm2) For convenience, the recommended tire sizes and cold tire pressures are on a label on the driver's doorjamb. For additional information about your tires, see page 454. 416 2009 MDX