This misalignment may be a result of either poor alignment settings or worn parts that create a misaligned front suspension. Tire scrub, a lateral force that pushes the tire sideways, adds to the rolling resistance of the vehicle. As a result, more energy is required to move the vehicle in its intended path of travel. Unbalanced tires bounce and lose contact with the road. Underinflating wears out the edges of the tire and adds to tire drag.
Fuel is wasted due to increased drag.
Overinflation wears the tire in the center. An improperly set camber caused this tire wear. Use the data chart on the next page to determine a medium or heavy truck's front suspension condition. Using an appropriate manufacturer's shop manual, inspect each front suspension component for excessive wear. Have your instructor check your findings.