The car tends towards oversteer as the race goes on because it loses more rear grip than it does front grip – not always the case, it depends on factors like the ambient temperature, the track temperature, the layout of the circuit, the characteristics of the tyres and so on – but as a rule of thumb, it loses more rear grip as the tyres degrade, so the driver would typically soften the rear bar and stiffen the front bar to maintain balance as the tyres degraded through a stint.
