Volkswagen Polo Service & Repair Manual: Tread Depth, Measuring
 Note
| When measuring tread depth, take measurements in the main
grooves. |
| Do not take measurements at the tread wear indicator. |
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|
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| Tread depth of a tire must be measured in the main grooves
at the points showing the most wear. The positions of the tread
wear indicators are marked along the tire shoulder
-item 2-
→ Item. |
| In place of “TWI”, there may also be a “Δ” or “VW emblem”. |
| The TWI protrusions are 1.6 mm tall. This is the minimum
tread depth legally prescribed in Germany. |
| Different values may apply in other countries. |
|
|
|
| Tread Wear Indicators (TWI) must not be included in the
measurement. The deepest point of the groove must be used for
the measurement. |
| A - |
Tread Wear Indicators in main grooves |
| B - |
Main grooves with Tread Wear Indicators
-arrows- |
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Heel-and-toe wear is step-like wear of individual tread
blocks, due to which an increased rolling noise can develop. The
heel-and-toe wear is caused by the uneven dis ...
In many causes, this is caused by driving style, but
sometimes it is also caused by incorrect axle adjustment.
...
Other materials:
Safety Precautions
General Safety Precautions
As per VBG 20, German industrial liability insurance
association.
Follow the instructions for the workplace. They should be
displayed in the workplace.
...
Introduction
This chapter contains information on the following subjects:
→ Indicator lamp
→ Windscreen wiper lever
→ Windscreen wiper functions
→ Service position for the front windscreen wipers
→ Rain/light sensor
→ Checking and refilling the windscree ...
Warranty Test, Performing
WARNING
Do not check or charge batteries that have a visual
indicator that is bright yellow. Jump starting must not
be used!
There is a risk of explosion during testing,
cha ...
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Heel and Toe Wear
Tire Wear, One Sided