We utilize the GSP9700 Vibration Control System our service specialists use this to  finish Tire & Wheel Packages goes far beyond the traditional capabilities of a wheel balancer. In addition to rectifying the inevitable wheel and tire imbalance, the GSP9700 Vibration Control System also “road tests” the mounted assembly to confirm virtually every aspect of a tire and wheel combination that might contribute to a vibration.

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, it should be replaced with another wheel or tire that is within tolerance. This helps maximize ride quality by minimizing the effects of tire force variation and rim runout.  

Once acceptable uniformity has been confirmed, or corrective actions have been completed, the technician can continue with precision wheel balance.

Hunter Engineering GSP9700 Specifications

Roller Force: up to 1,400 lbs. (635 kg)

Capacity:

• Rim Width: 1.5 in. (38mm) to 20 in. (508mm)
• Rim Diameter: 10 in. (254mm) to 24.5 in. (622.3mm)
• Maximum Tire Diameter: 40 in. (1016mm)
• Maximum Tire Width: 20 in. (508mm)
• Maximum Wheel and Tire Weight: 175 lbs. (80kg)

Radial and Lateral Runout Accuracy: .002 in. (0.05mm)

Radial Force Measurement Accuracy: 2 lbs., 10N (1.0 kg)

Imbalance Resolution: +/- 0.01 oz. or 0.5ms

Placement Accuracy: 512 positions, +/- .35°