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. |
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| 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:
Tires, Dismounting, Run-Flat Tires and Ultra High Performance Tires
Only trained personnel can perform the assembly work on
run-flat tires and ultra high performance tires.
If equipped check the tire pressure monitoring sensor with
the vehicle diagnostic tester and if necessary replace.
...
Side view
Fig. 1 Overview of the right side of
the vehicle Positions ③, ④, ⑤ and ⑤ are also at the same position on the left
side of the vehicle.
Key for :
Tank flap
Roof aerial
Attachment points for the mounts and
roof carrier
Door release lever
Exterior mirrors
Jacking p ...
Opening or closing the windows electrically
Fig. 32 In the driver door: buttons for
the front and rear electric windows with one-touch opening and closing.
First read and observe the introductory information
and safety warnings
Buttons in the driver door with one-touch opening and closing
Key for :
Buttons for the windows in the f ...
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Tires, Rolling Noises, General Information