I don't exactly know what measurements all of you have, because I'm from Spain.
But to me normal tires usually are 13 inch, 14 inch and 15 inch rim and 65 to 75 mm of rubber from rim to ground.
And what I mean with sharp objects is places like these: http://en.wikipedia.org/wiki/File:Gravel1.jpg
I also wonder if that's the reason why people drive jeeps and similar vehicles becuase of the tire size.
But to me normal tires usually are 13 inch, 14 inch and 15 inch rim and 65 to 75 mm of rubber from rim to ground.
And what I mean with sharp objects is places like these: http://en.wikipedia.org/wiki/File:Gravel1.jpg
I also wonder if that's the reason why people drive jeeps and similar vehicles becuase of the tire size.