Tread carefully.

When I went to get my tire fixed yesterday, it turned out the puncture was too close to the edge to be repaired, so it had to be replaced. I got the tires a while ago but they were under warranty, so it was free. And it occurred to me, why don't I just go stick a nail in my tire whenever it gets worn? I'm sure they'd catch on after a couple of times, but spread out over a few years ...