Checking disc wheels

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Checking the radial and lateral runout

The measuring points for radial and lateral runout on the inside of the wheel are given on the following drawing (dimension "a"). See Fig 1 .

Maximum permissible radial runout and lateral runout of the light alloy wheels = 0.7 mm

Maximum permissible radial runout and lateral runout of the wheel with tyre = 1.25 mm. Values less than 1.0 mm - better around 0.5 mm - are desirable. Also see General .

Important: Straightening and welding work on light alloy wheels is not permissible.

Fig 1: Measuring Radial And Lateral Runout Dimensions

Courtesy of PORSCHE OF NORTH AMERICA, INC.

Dimension "a" = 8 mm

NOTE:

Use a tyre measuring gauge - for example, V.A.G. 1435 - to measure wheels without tyres and wheels with tyres.

Fig 2: Identifying Tyre Measuring Gauge

Courtesy of PORSCHE OF NORTH AMERICA, INC.