How often do you get new tires?

[RolliePollie]

When they're kinda flat insted of round, that's the clue that they're getting worn...

This is what I go by too. Not flat in that they're not holding air, but flat as in more rectangular...like when you look at the tire from the side, there's almost an edge across the top because the road has worn the rubber sort of flat and wide.

I'm at 5,000 miles on my current bike and only my second set of tires. I did some switching around, so my front probably has 2,700 miles on it and the back probably around 1,500. They are both still in really great shape (knock on wood).