Tires and wheels for trucks can be extremely costly if you make a mistake. When a tractor or trailer cannot support the load, something as simple as inflation pressure will stop the vehicle. Overinflation reduces tire mileage and increases the possibility of impact breaks, although it may appear to be the lesser of two evils. However, even if the tire’s inflation pressure is sufficient to handle the load, there is still no guarantee there won’t be any problems. There are simply too many variables to consider.