Volkswagen Polo Service & Repair Manual: Wear Spots
| Wear spots are caused by a hard stop with locked wheels
whereby the rubber compound is abraded from the contact patch. |
| When the tires slide across the road surface, frictional
heat is generated which reduces the abrasion resistance on the
tread compound. |
| Even the most abrasion-resistant tread compound cannot
prevent wear spots which can occur during extreme braking. |
| Even ABS cannot completely prevent brief locking and the
resulting slightly flat spots. |
| The degree of abrasion is primarily dependent on the vehicle
speed, road surface and tire load. For clarification see the
following examples. |
| If a vehicle with locked front wheels is decelerated until
it comes to a stop, the abrasion of rubber on the post card
sized contact patch is approximately |
| from 57 km/h (35.41 mph) = 23.8 m braking distance, up to
2.0 mm, |
| from 75 km/h (46.60 mph) = 41.8 m braking distance, up to
3.3 mm, |
| from 92 km/h (57.16 mph) = 71.6 m braking distance, up to
4.8 mm. |
|
|
|
| Tires with this type of damage cannot be used and must be
replaced. |
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Rolling noise perceived by the human ear is caused by
vibrations transmitted from the noise source to the ear via the
air.
Here we are interest ...
Other materials:
Protecting
Caution
Missing protection leads to the electrical system
damage.
Note
All threaded connections must be tightened to the specified
torque.
...
Hub Cap for Alloy Wheels with Open Threaded Connection, Removing and
Installing
Removing
The wheel is removed.
Note
Hold the cap secure -1- with
the hammer.
Installing
...
Removing and installing the headlights
Fig. 176 In the engine
compartment: securing bolts for the right headlight
Fig. 177 Guides for installing the
right headlight
First read and observe the introductory
information and safety warnings
Depending on the vehicle variant, the headlight may have to be removed in
order to replac ...
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Tires, Rolling Noises, General Information