[Uniformity] Force Variations

Force Variation is the change in the forces as the tire rotates. The change in force is due to inconsistencies in tire manufacturing.


The ASTEC® Tire Uniformity Machine measures two types of force variation:

  • Radial Force Variation
  • Lateral Force Variation


Note: There must be a load on the tire to generate any force variation. Radial and Lateral force variations are measured in both directions of rotation (clockwise and counterclockwise).

Force Variation