Volkswagen Golf Service & Repair Manual: Damage caused when fitting

Volkswagen Golf Service & Repair Manual / Wheels and Tyres Guide - General Information / Evaluating tyres / Damage caused when fitting

Bead core broken during tyre inflation.

Modern radial tyres for passenger cars are mounted only on safety rims. Safety rims have a hump -1- running along the bead seat.

1 -

Hump

2 -	Inner rim shoulder

3 -

Rim

4 -

Wheel

5 -	Outer rim shoulder

The hump prevents the tyre from being pressed out of the rim shoulder when travelling with insufficient tyre pressure.

When the tyre is inflated, the bead of the tyre may not slip completely over the outer rim hump.

In this case, there is a danger of the bead core becoming overstretched if the tyre pressure is too high. The steel wires would then rupture partially or completely. A broken bead core cannot be detected from the outside.

DANGER!

Tyres with damaged bead cores are not seated safely and securely on the rim. Such tyres are a safety risk!

In addition, there is a risk of the partly broken bead core breaking apart during continued operation and the tyre could suddenly tear open. If the bead core breaks during inflation, the carcass will also be destroyed.

Damage caused when fitting

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