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Hunter’s exclusive Road Force Measurement System simulates a road test to identify radial force vibration and tire pull problems.
The GSP9700 Vibration Control System includes Hunter's exclusive Road Force Measurement System to help detect potential tire uniformity causes of vibration that are not balance-related. This system utilizes a "road roller" which applies up to 1,400 pounds (635 kg) of force against the wheel and tire assembly to measure their combined uniformity. This simulated road force test helps verify if the assembly is "round" when rolling under load.
The GSP9700 Vibration Control System can also measure lateral and radial rim runout (out of roundness or side-to-side movement) to identify and separate wheel runout from tire runout. The system then calculates the contributions of the wheel and the tire to a potential vibration and presents the service specialist with easy-to-follow instructions on the appropriate corrective actions.
If the wheel and tire are at the edge of acceptable tolerances, Hunter's patented ForceMatching feature is used to align the high point of the tire with the low spot of the rim. This helps maximize ride quality by minimizing the effects of tire force variation and rim runout. If a wheel or tire is found to be out of tolerance, it is replaced with another wheel or tire that is within tolerance.
Once acceptable uniformity has been confirmed, or corrective actions have been completed, the technician can continue with precision wheel balance. | 
