Volkswagen Polo Service & Repair Manual: Tire Wear, Outer Shoulder
| Improper Use of Air Suspension Height Adjustment |
| The use of off road levels is only recommended when driving
off road. The permanent use of off road levels on normal roads
can lead to increased tire wear because the changed height
changes the wheel alignment relative to the road level. |
| To Prevent One-Sided Tire Wear, Correct Axle Geometry
Adjustment Should be Ensured On the One Hand, and Intended Use
of the Vehicle on the Other Hand. |
| Good vehicle and tire maintenance helps to prevent tire
wear. The following points should especially be observed. |
| The specified minimum tire pressures must be maintained. |
| Different wear on front and rear axle cannot be avoided
depending on driving style. This can be counteracted by regular
tire rotation. This lends itself, for example, to the rotational
change from summer to winter tires and back. This change has the
positive side effect of all tires wearing evenly so a complete
set of new tires can be installed. This prevents use of
different tire tread depths on both axles, which can have
negative effects on driving behavior. |
| The formation of heel and toe wear is a normal wear pattern,
particularly with a very smooth driving style. Refer to
→ Chapter „Heel and Toe Wear“. This could result in a
louder rolling noise which are generally improved with increased
tread depth. If heel and toe wear is light or is still forming,
exchanging tires on both sides is generally sufficient. With
strong heel and toe wear, tires should be rotated according to
so that their direction of travel is reversed. Refer to
→ Chapter „Heel and Toe Wear“. This does not apply to
non-directional tires! |
| On some tire profiles, the effect of premature wear can be
detected visually: If winter tire ribs or profile recesses have
been worn off, only compact profile blocks without tread
pattern, which gives the impression of a worn tire. In this
case, the remaining profile depth in each tread groove must be
measured. If it is greater than the legally required minimum
tread depth (Germany 1.6 mm; it is recommended to use winter
tries with a remaining profile of 4 mm only in summer use
[regulation in Austria]), the tires can be reused without
restrictions. |
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In many causes, this is caused by driving style, but
sometimes it is also caused by incorrect axle adjustment.
...
Diagonal wear spots on tires
Diagonal wear spots run at an angle of approximately 45°
with respect to the plane of circumference.
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Tire Wear, One Sided
Diagonal Washouts