Impact Damage - Audi 100 1991 Repair Manual

Audi 100 1991 ➤ , Audi 80 1992 ➤ , Audi A1 2011 ➤ , Audi A2 2001 ➤ , A ...
The cause is the increase in material at the joints of the tire com‐
ponents.
Cracking has no effect on:
♦ Safety.
♦ Service life.
♦ Driving behavior or other tire characteristics.
Cracks can be of varying visibility. Removing the tire from the rim
or an examination is not necessary.
How did the cracks form?
Modern steel belted tires are constructed with single-ply sidewalls
to save weight.
The sidewall components consist of long strips before they are
joined together to form a tire. They must overlap at the joints.
Small irregularities/ripples form in the area of the overlapping
components. The overlaps are easier to see from the outside due
to the single-ply construction.
1.18.6

Impact Damage

A swelling in the flank of the tire indicates that the substructure of
the carcass has been damaged.
Typical causes for such damage include, for example, driving
over curbs at a sharp angle.
Pinching the carcass of a tire this way can damage the carcass.
The substructure of the tire is stretched so far that individual fibers
in the carcass may break.
The extent of the damage depends on the speed of impact, the
angle of impact, the air pressure, the axle load and the type of
obstacle.
Evidence of pinching in the tire side wall.
Note
Driving over curbs must be avoided!
♦
When it cannot be avoided, curbs should be driven over very
♦
slowly at the bluntest possible angle.
Interior view of a tire with a punctured carcass.
Due to a severe impact, the carcass was pinched on the rim flange
and is ruptured in the contact patch.
Wheel and Tire Guide - Edition 11.2010
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with respect to the correctness of information in this document. Copyright by AUDI AG.
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