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Tyres >Help >Tyres Help > What is the minimum legal tyre pressure in the UK?
At present there is nothing in UK law which specifies a legal minimum limit for a tyre’s pressure.
However, having said that, your tyres are required by law to be roadworthy. If a tyre is under inflated to a dangerous levels and are no longer able to function you could face fines and points on your driving licence.
When the pressure of a tyre is too low, the tread surface in contact with the road increases. This adds to the friction of the tyre (also called the rolling resistance) which leads to overheating. Overheating can significantly affect the health of the tyre – leading to premature wear, tread separation, and eventually, a tyre blowout.