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Tears in tyre > < Slow loss of tyre pressure

A4 Mk1

Temperature increase caused by insufficient inflation pressure
Temperature increase caused by insufficient inflation pressure
   
The graph shows the temperature changes for a tyre in operation at a speed of 180 km/h.
A - Normal range. When the specified tyre pressure is adhered to, the temperature will remain stable.
B - Danger zone. When tyre pressure is 0.3 bar below specification, the temperature rises to above 120° C at high speeds.
C - Critical temperature threshold. A tyre defect will develop.
T - Temperature
t - Travel time in minutes
  N44-0103

Tears in tyre > < Slow loss of tyre pressure