Both of our vehicles are due for new tires. My husband bought new tires for his truck and they worth $600 (4 of them). He had been talking about replacing the tires for sometime now and this weekend he went he bought new ones.
It is highly recommended to replace the tires of your cars or other vehicles immediately once you see that their getting thin. Chances of getting flat tires or difficulty driving in the rain can arise if you prolong the replacement. This is one way of keeping our vehicles in good condition.
As for my car, my husband will buy new tires the soonest possible.