Volkswagen Golf Service & Repair Manual: Measuring tread depth
 Note
| The tread depth is measured in the main tread channels. |
| Do not measure at the TWIs (Tread Wear Indicators). |
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| Measure the tread depth in the main tread channel, at the
points where the tyre is worn most heavily. The position of the
TWIs can be seen at various points on the shoulder of the tyre
→ Item. |
| A “Δ” or the manufacturer's “logo” may appear in the place
of “TWI”. |
| The bars of the TWI have a height of 1.6 mm. This is the
minimum tread depth required by German law. |
| Different values may apply in other countries. |
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| The TWIs must not be included in the measurement. Tread
depth should always be measured at the deepest point of the
tread channel. |
| A - |
TWIs in the main tread channels |
| B - |
Main tread channels with TWIs -arrows- |
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Saw-tooth wear is a stepped wear pattern on the individual
tread blocks → Fig.
that can cause increased tyre noise. The saw tooth is caused by
uneven ...
This is often caused by driving style, but can be the result
of incorrect wheel alignment.
Increased one-side ...
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Saw-tooth wear
One-sided wear