Relaxing music Narrator: Why do we balance wheels? We balance to cancel out the uncomfortable vibration that can be felt when an unbalanced wheel is traveling at speed, but balance is not the only cause of wheel and tire induced vibration. A vehicle may have four perfectly balanced, wheels and still experience vibration.
Vibration can also be caused by a bent rim How the tire fits on the rim Or by construction characteristics of the tire.
These factors contribute to road force, which is the change in force.
Acting on a wheel assembly as it rolls, Fortunately, road force is easy to correct.
If you can measure it Road force, balancers emulate driving conditions by pressing a roller against the tire.
The roller measures, the road force for an assembly and the balancer suggests corrections to minimize or eliminate the road force vibrations.
The most common corrective actions are match, mounting the process of rotating the tire on the rim to reduce road force, Bead massage a technique of exercising the new tire to better fit the rim Or placing higher road force assemblies in less sensitive wheel positions on the vehicle.
Like the rear, Balancing is always required to eliminate vibrations, but eliminating all wheel and tire induced vibration requires measuring and correcting road force as well.
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