Volkswagen Golf Service & Repair Manual: Flat spots (from locking wheels)
| Flat spots can result from an extreme brake application
which causes the wheels to lock, so that the rubber is worn off
at the contact patch between the tread and the road surface. |
| As the tyres slide over the road surface, friction generates
heat, which also reduces the wear resistance of the tread
material. |
| Not even a highly wear-resistant tread compound can prevent
the flat spots caused by violent braking. |
| Even ABS-controlled brake systems cannot prevent brief
locking of the wheels, and thus, minor flat spots. |
| The degree of such wear depends largely on the vehicle
speed, the road surface and the load placed on the wheel. The
following examples should make this clear. |
| If a vehicle is braked to a standstill on a dry surface with
the wheels locked, the amount of rubber worn from the tyre will
cover an area the size of a postcard and will have a thickness
of: |
| up to 2.0 mm from a speed of 57 km/h (23.8 m braking
distance) |
| up to 3.3 mm from a speed of 75 km/h (41.8 m braking
distance) |
| up to 4.8 mm from a speed of 92 km/h (71.6 m braking
distance) |
|
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|
| Tyres with such damage must no longer be used and must be
renewed. |
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Tyre noise that can be heard by the human ear is caused by
vibrations which are transmitted by the air from the source of
the sound to our ears.
...
Other materials:
Golf BlueMotion - from model year 2013, sales type 5G1
Note
The specified wheel and tyre combinations apply for all the
gearboxes allocated to the respective engines.
Deviations from this are specially indicated in the table.
Depending on equipment, the wheel-and-tyre combination 185/70 R15 on ...
Removing and installing swivel module position sensor -G474-/-G475-
Note
Left swivel module position sensor -G474- and right swivel
module position sensor -G475- are only fitted on gas discharge
headlights.
The swivel module position sensor is located in the
headlight housing a ...
Service interval display
Fig. 14 In the instrument cluster display,
A: Service warning, B: Service due
Fig. 15 Service information display in
the infotainment system
First read and observe the introductory information
and safety warnings The service display is shown on the instrument cluster
and in the inf ...
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General notes on tyre noise