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Useful Tyre Info

Research by MIRA Ltd
has shown that when tyre tread depth falls below 3mm, braking performance deteriorates considerably.


Tyres with a 3mm tread have a 25% better performance than those at the legal minimum of 1.6mm. In terms of stopping distance this represented an extra 8 metres, or 25 feet, in wet conditions. In one test, when a tyre with a tread depth of 8mm was compared to one with only 1.6mm, the stopping distance increased by 13 metres, slightly more than 42 feet.


The research has led to the majority of motoring experts recommending that motorists change their tyres when tread has worn down to no less than 3mm.



Good condition tyres are essential for safe driving and will affect steering, braking and acceleration. Here are some essential checks to carry out.

Damage - Inspect your tyres for damage regularly for bumps or bulges, foreign objects, cuts, cracks and tread wear (often a result of kerbing/scraping).

ACTION: Replace the tyre if damage is evident.


Tyre pressures - are vital for balanced breaking, maximum grip and maximum tyre life. Recommended pressures vary according to load or speed. The part of the tyre in contact with the road is the 'footprint'. Wrong tyre pressures will cause rapid wear and shorter life.

Check the pressure in your tyres daily and when the car has been parked for at least 3 hours. If you think a tyre might be low, try and check it as soon as possible with a tyre gauge and don't forget your spare tyre! The recommended cold tyre pressures are usually given on the tyre information label on the rear doorjamb on the driver's side (see image). Tyres can be checked and inflated at most petrol stations.