Tread Depth - Measure tread depths regularly
Pressures - Your car's handbook gives information about how to look after your tyres.
Tyre pressures should always be checked and corrected (if necessary) when they are cold.
Over or under inflating tyres are likely to seriously impair their performance.
Over inflation increases overall tyre diameter, decreases the amount of tread in contact with the road, decreases sidewall flexibility and affects road-adhesion.
Under inflation decreases overall tyre diameter, increases sidewall flexion, generates higher tyre operating temperatures and difficult vehicle handling characteristics. Running an under inflated tyre may cause premature tyre faliure.