Originally Posted by
ruindd
It might seem wasteful, but if i've got a lot of miles and lots of nicks and cuts in a tire...I often change it out after the 2nd flat. I don't flat very often (every 6-9 months) and when I do, it's usually due to a worn out tire.
I use 3 sets of tires up per year. Good tires have better casings and will hold up when the tread thins out.