Maintaining proper tyre inflation pressure is the single most important thing you can do to promote safety and tyre tread life.
Why proper tyre air pressure is essential:
All tyre manufacturers recommend that tyres always be inflated to the vehicle manufacturer's recommendations. This information can be located on the inner edge of the door, glove box, or fuel cap.  To maintain proper inflation, check your tyre pressure when they are cold. Remember to check the pressure in all of your tyres, including the spare, every month.
Inspect your tyres for uneven tread wear, if you see wear on the edges or in the centre of your tyre, visit your local tyre garage. The minimum tread depth of your tyre is 1.6mm, anything below will deem the tyre unfit for use.