Quick-Thread®
Motor assisted threading of the wing nut for quick installation and removal.
Radial Force Variation (RFV)
A term describing a measurement of the tire uniformity, under load, measuring the
variation of the load acting toward the tire center.
Radial Runout
A condition where the tire and wheel assembly is slightly out of round forcing the spindle
to move up and down as the vehicle rolls along a smooth surface.
Reed Tachometer
A mechanical device that uses reeds to indicate the frequency and magnitude of the
vibration.
Resonance
The point where a vibrating component’s frequency matches the natural frequency of
another component.
Responding Component
The noticeable component that is vibrating.
Road Force®
A change in the force between the wheel and the axle while rotating under a load.
Discrepancy in road force can cause a vibration although the tire and rim may be
perfectly round and the tire is balanced.
Road Force® Measurement
A measurement of the wheel assembly as would be found from an actual road test of a
vehicle. The GSP9720JLR is equipped with a load roller to take the Road Force
®
Measurement. The load roller places up to 1400 pounds of force on the spinning tire, and
automatically measures the effects of loaded runout and tire stiffness to emulate
tire/wheel assembly force variation. Loaded runout of rim and tire stiffness calculated
equals the Road Force
®
Measurement.
Road Force® Variation
A change in force exerted on the axle by the tire/wheel assembly while rotating under
load. Units of measurement are in pounds, Newton’s, etc.
Runout
The side-to-side movement of a wheel as measured from its true center.
Servo-Stop
The ability to locate varying positions of the tire/wheel assemblies and hold the position in
place while correctional weights or OE-Matching marks are applied.
SmartWeight® Balancing Technology
SmartWeight measures the forces placed on a wheel and balances in an effort to
reduce those forces, thus saving weight, time, and money.
Source Component
A component causing another object to vibrate, such as a tire/wheel assembly.
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Glossary GSP9720JLR Wheel Balancer Operation Instructions
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