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:
Two-Part HS Hardener
Definition:
Two-Part HS Hardener -LHA 009 041 A3-
Two-Part HS Hardener, Short -LHA 021 004 A3-
Two-Part HS Hardener, Extra Short -LHA 009 046 A2-
Two-Part HS Hard ...
Tire Wear, Center
This wear pattern is found on drive wheels on high-powered
vehicles that often drive long stretches at high speed.
At high speeds, the centrifugal force increases the tire
diameter at the center of the tread more than at the shoulders
of ...
Infrared Dryer -VAS6877
Definition:
Infrared Dryer -VAS6877-
Product Description:
The infrared dryer is used to dry paste, filler, base paint,
top coats and clear coats on vertical and horizontal surfaces.
...
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Tires, Rolling Noises, General Information