Tread depth: Make sure to check whether they meet the minimum safety standards. The depth of the tyre treads is a very important indicator of your tyre's health. It is these treads that ensure that you get the maximum grip and traction while driving on the roads. It is suggested that tyres need to be replaced if the depth of the treads is below 1.6 centimetres. It is easy to check for this since most of the tyres nowadays have tyre tread indicators. These are lumps of height 1.6 centimetres that lie on the groves. if these lumps and the treads are at the same level then it means that your tyre needs to be replaced.
Tyre Pressure: Another aspect that needs to be checked and which can also affect the fuel economy of your vehicle, your safety while driving as well as the life of your tyre. Make sure that your tyres are not overinflated or underinflated. Underinflation can damage your tyres through overheating while underinflation can affect the handling of your vehicle. It is easy to check for overinflation and underinflation. Check for whether your tyres are worn out. If it is the sides that have been worn out then the cause is underinflation while if it is the centre that has been worn out the cause is most likely over inflation.
In addition always look at the general condition of your tyres like if there are any cuts, lumps or if any object is embedded into the tyres that need to be removed.
Check for leaks as well. it is very easy to check for leaks. just apply soap water on the surface of the tyre and then check for the presence of bubbles. If you find any bubbles then there is a leak.