Checking Disc Wheels

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

Information 

Courtesy of PORSCHE CARS NORTH AMERICA, INC.

Tyre 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 tyres and wheels without tyres, use a tyre gauge, e.g.  > V. A. G 1435 - Tyre Gauge  , see Workshop Equipment Manual, Chapter 3.4.2. 

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 tyres, remove the wheel from the vehicle.

   > 440519 - REMOVING AND INSTALLING WHEEL 

2. Remove the tyre from the alloy wheel.

   > 444019 - MOUNTING TYRES (REMOVING AND INSTALLING TYRES) 

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