100% rotational accuracy is not possible due to technical considerations.
Therefore, the manufacturer allows a well-defined tolerance for these parts.
If the rim and tire are mounted in a disadvantageous position, this may cause the maximum allowable tolerance for the rim and tire to be exceeded.
Table 4.3 lists the maximum tolerances for a tire mounted disk.
Checking the radial and lateral runout of a disk with a tire using a dial gauge for tires VAG 1435
Lateral runout check
Pretension the tire dial gauge about 2 mm.
Pic. 4.15. Lateral runout check
Attach the indicator to the sidewall of the tire (pic. 4.15).
Spin the wheel slowly.
Record the minimum and maximum pointer deflection.
Note: If the difference is greater than 1.3 mm, then the lateral runout is considered to be exceeded.
Note: In this case, you can reduce it by minimizing.
Note: Deviations of the indicator needle due to small irregularities on the rubber should not be taken into account.
Checking radial runout
Pic. 4.16. Checking radial runout
Pretension the tire dial indicator about 2mm (pic. 4.16).
Attach the indicator to the tire tread.
Spin the wheel slowly.
Record the minimum and maximum pointer deflection.
Note: If the difference is greater than 1 mm, then the radial runout is considered to be exceeded.
Note: In this case, you can reduce it by minimizing
Checking the radial and lateral runout of the wheel
Pic. 4.17. Scheme for checking radial and lateral runout
Place the wheel on a balance stand.
Use the self-expanding collet adapter for VAS 5271 balancers.
Pretension the tire dial gauge about 2 mm.
Spin the wheel slowly.
Record the minimum and maximum pointer deflection.
S - Lateral runout.
H - Radial runout.
Compare the obtained value with the nominal parameters in table 4.4.
Note: Deviations of the indicator needle due to small irregularities on the rubber should not be taken into account.
Note: If the measured value exceeds the rated value, normal running will not be achieved.
Tolerances of radial and lateral runout of disks with tires
Tire rim | Radial runout (mm) | Lateral runout (mm) |
A car | 0,9 | 1,1 (1.3 in the marking area) |
Nominal values of radial and lateral runout of the wheel
Wheel | Radial runout (mm) | Lateral runout (mm) |
A car | ||
- Steel wheel | 0,5 | 0,5 |
- Alloy wheel | 0,5 | 0,8 |
Sharan | ||
- Steel wheel | 0,5 | 0,8 |
- Alloy wheel | 0,5 | 0,5 |
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