I figure if you actually run over a nail, business side pointed in, you're pretty much ska-roo-ed anyway. But for goatheads, shards of glass or metal, bits of fallen satellites or other flotsam or jetsam, it's a crap shoot. I do my best to avoid said obstacles, then rely on my trusty nail pullers to catch the rest.
"Every element of life entails a certain amount of risk, Jack."
Mr. Merriweather to Jack Crabb

heck yes; easy to make yourself. I encourage it.
I'm at the cresting wave of a major tire saver renaissance, I just know it.