Volkswagen Polo Service & Repair Manual: 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 the tire. The drive forces from the center area of the tread
are transferred to the road surface. This is reflected in the
wear pattern. |
| These effects can appear especially extreme on wide tires. |
| Reducing the Tire Pressure is Not an Effective Remedy for
this Wear Pattern. |
WARNING
| For safety reasons, tire pressure must never be
lowered below specified pressure under any
circumstances. |
|
| A largely even wear pattern can be achieved if tires are
changed in a timely manner from the tractive to the non-tractive
axle. |
|
|
|
| Typical wear pattern of tires on the tractive axle of
high-powered vehicles. |
| The increased wear at the tread center is caused by stresses
related to the centrifugal force of the tire and the
transmission of traction forces. |
|
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Diagonal wear spots on tires
Diagonal wear spots run at an angle of approximately 45°
with respect to the plane of circumference.
...
For all four wheels use only tires of the same construction
type, and tread.
Always use tires with the deepest tread depth on the front
a ...
Other materials:
Wheel bolt caps
Fig. 165 Removing the wheel bolt
caps
First read and observe the introductory
information and safety warnings
Take the wire hook from the vehicle toolkit .
Insert the hook through the opening in the cap and pull off in the
direction of the arrow.
The caps protect the wheel b ...
Refrigerant Circuit with Restrictor and Reservoir
Arrows point in direction of refrigerant flow.
A-Low pressure side of refrigerant circuit.
B-High pressure side of refrigerant circuit.
Component
Aggregate state of refrigerant
...
Windscreen wiper lever
Fig. 72 Operating the front windscreen
wiper
Fig. 73 Operating the rear window wiper
First read and observe the introductory information
and safety warnings
Move the windscreen wiper lever to the desired position
:
⓪
Switches ...
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