Tire
truing is the process of making tires perfectly round to the wheel.
Most tires are not perfectly round, due to a high spot on the tire.
This condition is referred to as out-of-round. By gently shaving the
high spot off of the tire, the out-of-roundness is corrected. Tire
truing can benefit everyone who has a vehicle by reducing road
vibrations, extending the life of a vehicles tires and suspension, and
also improving fuel economy.