VW Golf manuals

Volkswagen Golf Service & Repair Manual: Matching wheels and tyres

General
When radial or lateral runout of the wheel and tyre coincide, the imbalance of the wheel is amplified by the tyre.
For technical reasons, 100% true running is not possible → Chapter.
Before match mounting the used wheels which are fitted on the vehicle, run the tyres warm. This will eliminate any flat spots caused by storage or handling, → Chapter.
Procedure for match mounting
–  Let air out of tyre.
–  Press tyre beads off wheel rim flanges.
–  Apply tyre assembly paste all round the tyre beads.
–  Rotate tyre by 180° relative to wheel rim.
–  Pump up tyre to approx. 4 bar.
–  Attach the wheel (together with tyre) to the wheel balancing machine.
–  Check wheel for true running and for radial and lateral runout .
  Note
If the specified values for radial and lateral run-out are not exceeded, the wheel can be balanced to 0 gram. Specified values appear on → Anchor.
If the radial and lateral run-out is not within the specifications, the tyre must be rotated again.
–  Let air out and press tyre beads off the wheel rim flanges.
–  Rotate tyre by 90° relative to wheel (quarter of a turn).
–  Pump up tyre again to 4 bar and check true running.
  Note
If the specified values for radial and lateral run-out are not exceeded, the wheel can be balanced to 0 gram.
If the radial and lateral run-out are not within the specified values, the tyre must be rotated again.
–  Press tyre off wheel rim flange again as described above.
–  Rotate tyre by 180° relative to wheel rim (half a rotation).
If the radial and/or lateral runout are still not within the specified values, check the wheel for radial and/or lateral runout → Chapter.
If the measured values for radial and lateral runout of the wheel are within the specified values, the tyre has impermissibly high radial or lateral runout. In this case, the tyre must be renewed.
  Note
After fitting the tyres there will be fitting lubricant between the tyres and the rim flanges.
You should therefore avoid severe braking and acceleration manoeuvres for the first 100 or 200 km driven. Otherwise, the tyres can turn on the wheel rim. In this case, your work will have been in vain!
   
Checking radial and lateral run-out on wheel rim
–  Attach rim to wheel balancing machine. –  Use the centring system for wheel balancing machines -VAS 5271-. ...

Determining flat spots on tyres
What is a flat spot? The terms flat area and flats are also used for the term flat spot. Flat spots caused by storage or handl ...

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