I'm not really good on this part. I make a point never to spin out my tires. I think they have been great. To me, peeling out is just throwing $ down the drain. I'm dead a*s broke! Let me figure up what I driven on them for ya.
I got them on 6/5/07 @ 119.675. On 4/30/10 I had 131,971 miles. That's 12,296 miles.
Plus. I don't drive mine that much. I've rotated them once. I really don't know the tread depth, I do have a ways to go on them.
On my last 3 rides, I've had BFG's. 2 sets on this Mustang, just went from 245 to 275. I love them!
Oh yeah, I use mine as my daily driver as well. I just don't have a need to go anywhere!