Curious what people are getting for life on the stock tires before you switched them out :
How many total miles?
Number of track days?
Any current suspension mods?
I'll play. I replaced the rears at 16,000 miles and 1 track day. Not many track days due to cooling/heating issues on my tech pack car. I replaced the fronts at about 22,000 miles if I recall correctly. That was after a couple more track days as well.
I have replaced the rears a second time, because I caught a nail too near the shoulder. They weren't worn out. I have about 32,000 miles on it.
However, my numbers should be taken with a grain of salt because I run snow tires in the winter. I also don't push super hard into understeer at the track. When I feel the car understeering I tend to ease up. I realize that you can put a bunch more steering angle in and get through corners faster. I just don't do it.