2012 Chrysler Town & Country Owner Manual - Page 474

472 STARTING AND OPERATING Inflation pressures specified on the placard are always "cold tire inflation pressure." Cold tire inflation pressure is defined as the tire pressure after the vehicle has not been driven for at least three hours, or driven less than 1 mile (1.6 km) after a three-hour period. The cold tire inflation pressure must not exceed the maximum inflation pressure molded into the tire sidewall. Example: If garage temperature is 68°F (20°C) and the outside temperature is 32°F (0°C), then the cold tire inflation pressure should be increased by 3 psi (21 kPa), which equals 1 psi (7 kPa) for every 12°F (7°C) for this outside temperature condition. Tire pressure may increase from 2 to 6 psi (13 to 40 kPa) during operation. Do not reduce this normal pressure Check tire pressures more often if subject to a wide range buildup or your tire pressure will be too low. of outdoor temperatures, as tire pressures vary with Tire Pressures For High-Speed Operation temperature changes. The manufacturer advocates driving at safe speeds Tire pressures change by approximately 1 psi (7 kPa) per within posted speed limits. Where speed limits or condi12° F (7° C) of air temperature change. Keep this in mind tions are such that the vehicle can be driven at high when checking tire pressure inside a garage, especially in speeds, maintaining correct tire inflation pressure is very important. Increased tire pressure and reduced vehicle the Winter. loading may be required for high-speed vehicle operation. Refer to original-equipment information, or an authorized tire dealer, for recommended safe operating speeds, loading and cold tire inflation pressures.