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:
Tires, Mounting, 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.
...
Introduction
This chapter contains information on the following subjects:
→ Technical requirements
→ Fitting the removable ball coupling
→ Removing the ball coupling
→ Hitching and connecting the trailer
→ Loading the trailer
→ Towing a trailer
...
Run-Flat Tire, Retrofitting/Conditions for use of Run-Flat Tires
Caution
Using run-flat tires on vehicles is permitted only
if the run-flat tire is supplied with the vehicle either
as standard equipment or as an option.
Because pressure ...
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Diagonal Washouts
Permitted Tread Depth - Variance