Volkswagen Golf Service & Repair Manual: Determining flat spots on tyres
| The terms flat area and flats are also used for the term
flat spot. |
| Flat spots caused by storage or handling also cause
vibration in the same way as incorrectly balanced wheels do. It
is important that flat spots on the running surface of the tyre
are identified as such. |
| Flat spots caused by storage or handling cannot be balanced
and they can reoccur at any time due to various circumstances.
Flat spots caused by storage or handling can be eliminated
without complicated special tools. This does not apply to flat
spots caused by hard braking. |
 Note
| Flat spots caused by hard braking cannot be repaired. Such
tyres must be renewed. |
| Reasons for flat spots caused by storage or handling: |
| The vehicle has been left standing in one place without
being moved for several weeks. |
| The tyre pressure is too low. |
| The vehicle was placed in a paint shop drying booth after
being painted. |
| The vehicle was parked with warm tyres in a cool garage or
similar for a long period of time. In this case, a standing flat
spot may even occur overnight. |
| Eliminating flat spots caused by storage or handling |
| Flat spots caused by storage or handling cannot be
eliminated from the tyre using workshop equipment. |
| Flat spots caused by storage or handling can be removed only
by running the tyres warm. |
| The method described below is not recommended in cold and
wintry weather. |
| Requirements and conditions: |
| – |
If necessary, check tyre pressure and correct. |
| – |
If possible, drive the vehicle onto a motorway. |
| – |
Traffic and road conditions permitting, drive a 20 to 30 kilometre
stretch at a speed of 120 to 150 km/h. |
WARNING
| Do not endanger yourself or other road users during
this road test. |
| Observe the highway code and speed limitations in
force when performing the road test. |
|
| – |
Jack up the vehicle immediately after the trip. |
| – |
Unbolt wheels from vehicle. |
| – |
Balancing wheels on stationary wheel balancer
→ Chapter. |
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Matching wheels and tyres
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