Disadvantages of over-inflation

An overinflated tire becomes stiff and inflexible, reducing the size of the contact patch, i.e., the contact area with the road. If a vehicle's tires are overinflated, they are more susceptible to damage and can be damaged by potholes or dirt on the road. Other consequences include uneven tread wear. Overinflated tires can no longer effectively absorb road imperfections, reducing ride comfort, resulting in a harsher ride and increased noise transmission into the cabin. However, a moderate increase in tire pressure reduces rolling resistance and generally offers a slight improvement in steering precision and cornering stability. This is why participants in road races or autocross increase their tire pressure. Higher tire pressure also has a positive effect on fuel consumption.

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