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:
Cleaning stowage compartments, drink holders and ash trays
Fig. 143 In the front centre console:
stowage compartment and drink holders
Fig. 144 Ashtray with snuffer, removed
and opened
First read and observe the introductory information
and safety warningsCleaning stowage compartments and drink holders
Moisten a clean, lint-free cloth with wat ...
Checklist
Never carry out any work on the engine or in the engine compartment
if you are not familiar with the requisite procedures and general safety requirements,
or if you only have access to incorrect operating equipment, service fluids,
and unsuitable tools . The work should be carried ou ...
Wheel bolts
Fig. 166 Changing a wheel:
loosening the wheel bolts
Fig. 167 Changing a wheel:
anti-theft bolt and adapter
First read and observe the introductory
information and safety warnings
Only the spanner delivered with the vehicle should be used to loosen the
wheel bolts.
Only loosen the whee ...
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Tires, Rolling Noises, General Information