2012 Jeep Wrangler Owner Manual - Page 446

444 STARTING AND OPERATING Economy Improper inflation pressures can cause uneven wear patterns to develop across the tire tread. These abnormal wear patterns will reduce tread life resulting in a need for earlier tire replacement. Under-inflation also increases tire rolling resistance resulting in higher fuel consumption. CAUTION! After inspecting or adjusting the tire pressure, always reinstall the valve stem cap. This will prevent moisture and dirt from entering the valve stem, which could damage the Tire Pressure Monitoring Sensor. Ride Comfort And Vehicle Stability Inflation pressures specified on the placard are always Proper tire inflation contributes to a comfortable ride. "cold tire inflation pressure." Cold tire inflation pressure Over-inflation produces a jarring and uncomfortable is defined as the tire pressure after the vehicle has not ride. been driven for at least three hours, or driven less than Tire Inflation Pressures 1 mile (1.6 km) after a three-hour period. The cold tire Tire pressure should be checked and adjusted as well as inflation pressure must not exceed the maximum inflainspected for signs of tire wear or visible damage, at least tion pressure molded into the tire side wall. once a month. Use a good quality pocket-type gauge to Check tire pressures more often if subject to a wide range check tire pressure. Do not make a visual judgement of outdoor temperatures, as tire pressures vary with when determining proper inflation. Radial tires may look temperature changes. properly inflated even when they are under-inflated.