Many drivers don’t know exactly when to change tyres. They seem to drive way too long on the same tyres before they change them. This is especially the case if they don’t rotate the tyres or change between summer tyres and winter tyres. In addition, they may forget to check the tyre pressure regularly and they do it only when the car is brought for service or during the vehicles mandatory inspection.
First of all, a driver should actively maintain the tyres and check them on a regular basis. All aspects of the tyre should be checked. Check the condition of the tyres, based on just looking at them in good light. How do they look, do they look worn out, are there any visible damages to the tyres? If you see any problems with the tyres, it is good to bring them to the tyre service station to let the professionals have a look at the tyres. They can easily assess if they tyres are still ok, or if you need to replace the tyre or all the tyres.
The second thing you should do is to measure the tread depth. The easiest way to measure it is to push a coin into the tread and measure how deep the coin could be pushed into the tread. The tread depth should be more than 4mm for you to still be driving with them. If the tread depth is 4mm or lower you need to purchase a new set of tyres. When you go below 4mm you loose a lot of the tyres’ key properties such as grip and stability. Also the braking distance is prolonged, and the likelihood of aquaplaning is increased.
The last ting to check is the tyre pressure; this should be checked on a regular basis. The tyre pressure can be found in the car manual. It is good to know that the tyre pressure varies with temperature. The valves might also leak and cause a loss of pressure. Driving with too low pressure is not good for the tyre and the tyre wear increases, as does the fuel consumption. So if you don’t keep them inflated, then you will need to buy new tyres soon.