Trucks have a reputation for being tough and those that drive them don't want to always use them on smooth pavement. Nonetheless, it would be foolish to purposely drive them on terrain full of a huge amount of nails etc. However, the question is, "How do we know a really bad terrain for a truck vs a normal one?". Note, we obviously need to know the answer cause torn tires will cost owners a lot of money. Anyhow, we can also apply the same question, but slightly modified, mentioned in this thread to cars.