A first order tire and wheel vibration is usually the result
of one of the following five conditions:
| • | Excessive radial runout |
| • | Excessive lateral runout |
| • | Excessive radial force variation |
| • | Excessive lateral force variation |
These conditions must be eliminated one at a time in order to attain
a set of tires that are free from vibration causing elements. Substitute a
set of tires from another vehicle only as a last resort, and only after
the tires have been tested on a similar vehicle under the same conditions.
Correcting the existing tire and wheel assemblies is the most accurate and
least time consuming approach. This is due to vehicle-to-vehicle sensitivities
and the differences between the hubs of any two vehicles.
