Checking Disc Wheels

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).

Information 

Courtesy of PORSCHE CARS NORTH AMERICA, INC.

Tire gauge

• 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 gauge, e.g. > V.A.G 1435 - Tire Gauge, see the appropriate Service Information . 

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

Courtesy of PORSCHE CARS NORTH AMERICA, INC.

Dimension a

If in isolated cases further measurements are necessary, 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 MOUNTING TIRES (REMOVING AND INSTALLING TIRES) 

3. Clamp the wheel on the balancing machine and take measurements at the points -a-  .