Checking Radial And Lateral Runout

Information 

• Straightening and welding work cannot be performed on light alloy wheels  .
• The work is carried out initially with the wheel mounted on the vehicle  .
• To measure wheels with tires and wheels without tires, use a tire measuring gauge, e.g. VAG. 1435  .
  Fig 1: Identifying Tyre Gauge

  Courtesy of PORSCHE CARS NORTH AMERICA, INC.

Maximum permissible radial runout and lateral runout of the wheel with tire = 1.25 mm. Values less than 1.0 mm - around 0.5 mm would be better - are desirable. For this purpose, match the tire (turn the tire on the rim if necessary).

Maximum permissible radial runout and lateral runout -a-  of alloy wheels = 0.7 mm.

Fig 2: Measuring Points Of Rim

Courtesy of PORSCHE CARS NORTH AMERICA, INC.

If further measurements are required in some cases, carry out the following procedure.

1. To measure wheels without tires, remove the wheel from the vehicle. → 440519 REMOVING AND INSTALLING WHEEL 
2. Remove the tire from the alloy wheel. → 444019 FITTING TIRES FOR VEHICLES WITH AND WITHOUT TYRE PRESSURE MONITORING (TPM) 
3. Clamp the wheel on the balancing machine and take measurements at the points -a-  .