VW Polo manuals

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.
   
Wear Spots in Tread
Tires with this type of damage cannot be used and must be replaced.
 

Wear Spots

Tires, Rolling Noises, General Information
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 ...

Vehicle Pulls to One Side
...

Other materials:

Contents
Fig. 162 Contents of the vehicle toolkit First read and observe the introductory information and safety warnings The content of the vehicle toolkit depends on the vehicle equipment level. The following describes the maximum scope. The vehicle toolkit contains the following Screwdriv ...

Checking with Expansion Valve, Receiver/Dryer and A/C Compressor Regulator Valve -N280-, Externally Regulated A/C Compressor
Specified Values   Note Connecting service station. Refer to → Chapter „Connecting Service Station“. Observe test requirements. Refer to → Chapter „P ...

Critical Point
Vehicle air conditioning systems make use of the vaporization and condensation process. In this case, one works with a substance which boils easily, designated as refrigerant. The refrigerant employed is tetrafluoroethane R134a, which bo ...

© 2016-2025 Copyright www.vwpolo.net