Tire and wheel radial run-out are often factors in troubleshooting ride and handling and in maintaining correct wheel balancing. With older run-out gauges, numerous adjustments needed to be made to get an accurate reading. The Radial Run-out Gauge offered by Tru-Balance Wheel Centering Products, requires two adjustments. This product is designed to eliminate tire vibration and irregular tire wear by centering the wheel to the wheel stud rather than the hub pilot, resulting in a smooth ride, increased tire life and increased fuel mileage.