Separation at the tyre crown Follow our advice to prevent crown separation - Photo credits ©: All rights reserved

When checking the state of your tyres, you find that casing has partially or totally separated. The crown plies have separated from the tread.

This may be due to:

  • Prolonged driving with an insufficient tyre pressure and/or an excessive load (possibly the load index is too low)
  • Previous damage that has not been repaired and has become worse (kerb impacts for example)


To remedy this, it is recommended to:

  • Immediately withdraw the tyre from service
  • Check that the tyre is suitable for its use (dimensions, load index…)
  • Avoid excessive loads and weigh each axle to determine the right pressure, based on the manufacturer’s recommendations and the vehicle’s use
  • Check the state of your tyres regularly to repair any damage in good time, before it gets worse and becomes irreversible.

Things to know

When a tyre is subjected to excessive loads it overheats, particularly the upper part of the tread, which causes separation of plies.

Tyres on trailers or semi-trailers are particularly concerned by this type of damage due to scuffing when vehicles drive around town.

 

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