How do you expect anyone to know if you need new tires just by answering an internet forum posting? Let me ask you the same question, do I need new tires on my Corolla? They have been on there 4 years and 40,000 miles. Do you know? I don't know about the tires on your vehicle either!!!!!!
There is one sure way for YOU to know, however. Do a little research about tire wear, when tires should be replaced, and minimum acceptable tread depths before replacement. You can easily do this yourself on the internet using Google.