TIRES AND WHEEL Overloaded Tires 1 3 Overloading your truck is as damaging to your tires as underinflation. The following chart shows how neglect or deliberate abuse can affect the life of your tires. Proper-Inflation: the correct profile for full contact with the road. Over-Inflation: reduces the tread contact area with the road surface, concentrating all of the vehicle weight on the center of the tread. This causes premature wear of the tire. TREAD CONTACT WITH ROAD TREAD CONTACT WITH ROAD 2 Under-Inflation: causes abnormal tire deflection, which builds up excessive heat, running the risk of failure. It also causes irregular wear.
5 TREAD CONTACT WITH ROAD 5-142 Y53-6077-1B1 (03/17) EFFECT OF LOAD PRESSURE ON TIRE LIFE Vehicle Load Normal 20% Over 40% Over 60% Over 80% Over 100% Over Tire Pressure Normal 20% Low 30% Low 35% Low 45% Low 55% Low Expected Total Tire Mileage Normal 70% 50% 40% 30% 25%